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Is rh negative blood really headed for extinction?

Carvalli-Sforza once claimed that it was just a matter of time until rh negative blood is going extinct.

Don’t believe theories until proven. No matter who comes up with them.

Similar claims were made about red hair by others. According to his “logic”, a gene with a frequency less than 50% in the population is doomed to disappear. Of course, he didn’t take into account that the Basques for example generally speaking prefer to have children with each others. But there are a couple of other reasons why the extinction of rh negative blood does not make any sense:

1) Higher sex drive in rh negative women

Did a higher sex drive in women with red hair and rh negative blood keep these traits from going extinct?

This by the way is also in existence among women with red hair. Some say men with rh negative blood and men with red hair might be more passive and women learned to compensate. Whatever it is, this could have been a huge contributor in the past especially to rh negative tribes not slowing down. It is nature’s way of keeping a minority trait alive. And so far it seems to work quite well.

2) The rejection of an rh positive fetus

The ancient inability to produce more than one rh positive child was probably a big part of keeping the rh negative blood factor on earth.

This also in the past seems to have contributed to rh negative blood not getting “lost” when tribes began to mix.
Of course, now we have the Anti-D shot, but many rh negative women still believe it might be wise to have an rh negative man to avoid complications all together. Of course, we believe in giving a free option to those who prefer
to have an rh negative man with our free blood type dating site where you can actually select the blood type of your preferred partner and then see who pops up.

3) Blood type personality traits

Have we been ignoring one of the most important findings from the last century?

Some believe that harmony is at its best when two people come together who can save each others’ lives with their bloods. Others think that somehow people with the same blood type, especially rh negatives, just tend to attract one another. Of course, we also believe in giving everyone the freedom to make their own choices. But have you ever dated someone who shares your blood type? Even back in 1935, a physician once suggested that this is the key to happiness. If this is the case, how could such major information have gotten lost?


Are rh negative women more likely to have autistic children?

Unfortunately, there are several studies out there which are strongly indicating this being the case.
Here is a major reason why:

The autism epidemic began when the Anti-D shot for rhesus negative women pregnant with a rhesus positive fetus was approved. And the issue was not so much the shot itself as was the standard operating procedure and time the shot was administered. Rather than giving it before a pregnancy, women would receive it during the pregnancy allowing the antibodies to damage the fetus before the shot was given. That included causing serious damage to the brain cells as well.

Before the shot was approved, such fetus would eventually be completely destroyed. But then the already damaged fetus was saved from dying and often resulted in a child with sometimes severe issues.

If you are rh negative and the man in your life rh positive, make sure to get an antibody screening before getting pregnant and request the Anti-D shot as well to not give your antibodies a chance to harm the braincells of your unborn child.

If the man in your life is rh negative as well, this problem is non-existant. But make sure that his blood type is truly rh negative as blood type tests can show different results. If and only if it turns out he is rh negative as well, my advice is to not take the Anti-D shot even though it is often standard operating procedure to administer it anyways.

Please continue here:

Are rh negative women more likely to have autistic children? Part 2


Can a blood type AB/blood type O couple have AB and O children?

The answer is “YES!”.
And sadly there are many medical journals claiming otherwise and not correcting it.
There is a phenomenon called cisAB where both, the A and the B are encoded into one allele.
So if for example you are cisAB/O, partnering with a blood type O can result in offspring being either cisAB/O with phenotype AB or blood type O.

Because both A2 and B3 phenotypes are inherited as the single unit in the cis manner, it was named as cis-AB allele.

In detail:

When one parent carries a Cis AB allele, the other allele can be any of O, A or B and the phenotype of this parent is always AB, but the children will inherit either the AB or the other allele from this parent.

  1. If the other parent is O phenotype (OO genotype) there are three possible scenarios for the blood group of children of a Cis AB carrier (and a 4th very unlikely scenario):
    1. The second allele is O: children are either AB or O
    2. Second allele is A: Children are either AB or A
    3. Second allele is B: Children are either AB or B
    4. A very rare 4th possibility exists: if the other allele is also Cis AB then the children will be always AB irrespective whatever the other parent is, because they will have one cis AB allele from this parent.
  2. If the other parent is type A, depending on whether this parent is genotypically AA or AO and what the other allele is in the Cis Ab carrying parent, the following scenarios are possible:
    1. Other parent is AO and second allele is O: The children are either AB or A or O
    2. Other parent is AA and the second allele is O: The children are either AB or A
    3. Other parent is AO and second allele is A: The children are either AB or A
    4. Other parent is AA and the second allele is A: The children are either AB or A
    5. Other parent is AO and the second allele is B: The children are either AB or B
    6. Other parent is AA and the second allele is B: The children are always AB
    7. Rare situation: If the other allele is also cis AB:The children are always AB
  3. Likewise, there will be similar scenarios for the other parent being type B:
    1. Other parent is BO and second allele is O: The children are either AB or B or O
    2. Other parent is BO and second allele is A: The children are either AB or A
    3. Other parent is BO and the second allele is B: The children are always AB or B
    4. Other parent is BB and the second allele is B: The children are either AB or B
    5. Other parent is BB and the second allele is O: The children are either AB or B
    6. Other parent is BB and the second allele is A: The children are always AB
    7. Rare situation: If the other allele is also cis AB:The children are always AB

(Caution: ABO inheritance is generally derived assuming the children are not the very rare Bombay phenotype which would require both parents to be carriers of it.)

So don’t freak out if you are blood type O and your dad is AB. Years ago every doctor would have claimed that it is impossible, but now we know it isn’t.

Blood types are simply not reliable ways to exclude paternity in general. More reasons here:
4 major reasons why blood type tests can show different results


Are rh negative people better off dating other rh negatives?

The overall formula on our site encourages rh negative people to match up. Why?
Here are the simple reasons:
1) The concept behind blood type dating was born due to the complications pregnant women often encounter being rh negative and their fetus rh positive.
Even if there is an rh negative fetus, oftentimes the Anti-D shot is being given “just to make sure” when not needed.
Then women often do not get the shot in time and suffer a miscarriage due to that.
In other words:
The medical industry does not seem to be interested in making advances and doesn’t seem to prioritize the minority that is us.
I therefore do strongly believe that at this moment in time, rh negative women deserve the option to select a future partner by blood type in order to be able to avoid the need to have a defect medical industry responsible to save their child or take care of them when they obviously continue to fail to do so all too often.
2) We want to encourage people to know their blood types
This is of utmost importance as we continue to suffer blood shortages due to giving O negative blood to people in emergency situations. The system needs to be made over to where we are aware of our blood types and can identify them easily. It also is necessary to know your blood type should you travel to a country where yours is rare, so that in advance you are able to contact organization in those regions making sure those with rare blood types are being helped when needed as the medical businesses there often are not prepared to service you properly.
3) Personality traits have been proven to be connected with blood types
We usually hear about Japan and Korea and many dismiss it as “eastern pseudoscience”.
But did you know that Harvard has conducted a study in the 60s showing for example the same results about blood type A people as are shown in every single study since?
They say “don’t dismiss until you try” which of course is not always true. But in the case of dating according to your blood type, I do not seem how it can harm you.

Ready to give it a try? It’s FREE. Continue here…


What do men and women lie about the most on dating sites?

Unfortunately people lie. In real life and on dating sites. There are different reasons why people do that. Some are simply insecure and cannot believe someone will give them a chance if “all they are” is being themselves. Others have more sinister motives preying on people. There are ways to protect yourself and as always I advise that you take your time, don’t give any personal information until truly comfortable and simply don’t make any quick decisions without sleeping over them.

We all have intuition and when it comes down to it, it is accessible to guide us.

Here is what men and women both lie about the most on datings sites:


1) Income

Claiming to make more money appears to be the number 1 lie men tell in their online dating profiles.

The perception is often that women want stability at least and an amazing lifestyle at best. However, that is not always the case: Women often desire to build a future together with their men. In Western culture a woman is not always interested in depending on a man financially, but rather wants to make her own dreams come true and simply needs a man who is supportive of that. If insecurity is why YOU may think you need to inflate your income, know that with false expectations set you will start a relationship on a very bad note as being “caught” is likely. And if you are lucky and the lady does not care about your income either way, then there was no “need” to boost the numbers to begin with.

2) Height

The second biggest lie men tell on their dating profiles tends to be adding some inches.

This is such a common white lie that is often used by movie actors and average men alike. I am not quite sure why there is this need as I often see men of shorter statue with a tall, model-like woman. Some women prefer taller men. Other women simply do not care. And my advice is to just BE and know that the advantage of being on a dating site is to filter your search based on what you care about and ignore the parts that you just don’t.

3) Previous marriages

Leaving out relationships that didn’t work is also common. Women do not tend to do it that much.

Giving the woman the impression that she may be doomed for the same type of ending as the other(s) is something that reasonably many try to avoid. “Don’t judge me by my past” is often the thing men are really trying to say when clicking on “single” rather than “divorced”.

If you have truly closed the doors to your past and decided to start over, there is no need to lie. Lay the cards out and show by being you that there is no need to worry about this.

4) Being “too nice”

Women do not need a “nice guy”, but a real guy. Anybody can act nice. Who are YOU and what do YOU have to offer?

Yes, women make the mistake to say “I want a nice guy”, because what you need is a REAL GUY. Anybody can be nice, but if this is not the true you, then you deserve to finish last. Women who are alert and have clean energy often sense and assume fakeness. Show your edges. Show controlled anger if it’s there. Give her an idea of what you want, where you are going in life and what it is you need. Pretending everything is great all the time won’t give her the chance to help you get where you are. Remember: Love changes everything and that includes you. But you cannot try to be perfect already when all you need is a true partnership to grow into the best versions of you both together and let her see your strong sides as well as her weaknesses. Then she knows what she can rely on and lean on as well as where her strength might compliment and help you make your life better.

5) Children

Nobody wants to appear to have baggage, but playing with open cards always works best long-term.

Do you have children? And think it might be “best to leave that part out”? Don’t!


1) Weight

Many women believe that the man they really want won’t pay attention to them if their scale goes beyond a certain number.

Do you really think it is just the weight that might keep a man from dating you? Or could it be something else? Why do you think you have gained weight? Could it be that it is more of an expression of something that might be keeping you from letting someone get close to you?

Not all heavyset people are created equal. There are women who are heavy, have always been, but have amazing energy to them and often wind up with a goodlooking and successful man simply because they inspire him and both are compatible on most of the other levels.

There are two solution in my opinion:

1) Stand behind your weight and see where it takes you.
2) Get some healing and be a warrior against it rather than ignoring its existence.

The best thing is not to think about your weight, but live your life according to a very simple rule:

1) Only eat what is fresh and what is natural.
2) Listen to what you crave amongst those foods.

If you crave potato chips, it is not exactly those boring tasting potato skins that you crave, but the artificial flavoring. Instead of going for potato chips, look at what those artificial ingredients simulate and buy the real deal such as paprica, onions, garlic and whatever else there is.

Also avoid bread as it simply isn’t food, but filler. And that also goes for pasta and pizza. If you crave some carbs, try baked or cooked potatoes and rice.

Some people who have diabetes can live well without insulin if their diet consists of vegetables and meat alone and there is a reason for that. Life is very simple, but we are allowing it to become difficult. And this very natural and simple advice is not given to help you lower the number of your scale… it is to help you be healthy. And with health comes better more positive energy resulting in yes, a better aura, more of a dynamic presence, an overall higher quality of life and probably a look that will help shine the true you through.

2) Age

Racquel Welsh, now 77, is only one of many women whose age has not slowed them down.

A man does not need to love you for him to sleep with you. If you use a photo that is 20 years old, he will be attracted to that picture. Then when he meets you, he may or may not care but he may also be attracted enough to sleep with you, but afterwards lose interest as you simply are not what he has anticipated. When people feel deceived, they can also get angry and become hurtful and indifferent as a result. My advice is to never use a picture more than 3 years old. You want to give the man the feeling of who you are NOW. Who you have involved into. Look at your face and get an idea of where you have been and where you wish to go in life. There is more to life that age and energy is a big one. Some women look more attractive in their 50s than they did in their 30s and that often comes from an inner reboot and most of all a different outlook on life.

If you are not happy with yourself, do not put the blame on age. Turn things around and look at women whose careers have taking a positive turn at a higher age. Then look at the men they are with. And then tell me again that you really need to lie about how old you are.

3) Interests

Whatever your interests: If you don’t “come clean”, you may have to give them up or practice them in secret.

This is something that has surprised me learning it. Apparently quite a few women believe that if their true personality shows too much, men will not be drawn to them, so they rather than answering questions honestly try to design them to appear “easy to live with”.

This is one of the huge reasons why there is so much miscommunication as eventually our true colors do show and you may wind up with a guy who took your answers at face value rather than someone who can accept and actually like who you are getting the chance to date you.

Just be you and see where things go, because dating sites are full of men and women and out of these many fish in the sea, you will probably be happiest when finding the one most suited for you. And that will not happen when you try to please everyone.

4) Expectations

If your outlook on life is that you do not deserve to aim high, it can eventually make your future partner feel like a “plan B”.

Think you come off superficial if requiring a man of a certain height with athletic built who considers himself very attractive? Or shallow if you require a certain income in a partner?

Yes, love comes when it comes and how many times have you heard someone perfectly happy with her partner say “it is weird, because he is SO NOT MY TYPE”?

The truth is we are usually walking through all the requirements stated when love kicks in and at later times often consider what we once held important as silly. But it is good that while on this journey called life, you actually reflect your current position. If you think that something is important to you, let it all out rather than getting into the mindset that you should settle. There is little worse than being with someone because you felt this is the best you can do and later someone who represents what you always wanted showing interest in you when you already have a couple of children. Be humble, but don’t decide to only go for the sure thing. Let’s see what and who is really out there for you!

5) Acting insensitive

Let somebody know you!

Women understand when it is just a guard put up by the other person, but men don’t always see through it. Acting indifferent may help protect you from people but can also keep the right one from coming in. Sure, it is an understandable mechanism in many public settings that works, but when someone is truly interested in you, it can definitely convince the guy that you are really not interested in getting to know him and just are not in the right state of mind to be too close to anyone. Learn to trust. Step by step. And lose the guard when the time is right.

So how can you avoid falling for lies, especially when the intent is malicious?

Understand when starting communication, it is better to listen than speak. If you speak about yourself too much, you might miss the warning signs and give the wrong guy too much of an opportunity to simply tell you what you want to hear rather than letting you know who he is.

Con-artists are avid observers. They look for weaknesses at all times. And when they think they have found one, they will continue to attempt to exploit them.

So keep your mouth shut and don’t yap about everything you think you want and need for him to have nothing other to do than agree and feed you lines. Con-artists always go for the easy. The moment the other party shows signs of using his or her head and expressing doubt where things make no sense, respect kicks in and he or she backs off.

Being too needy is fine, but do not show all of it so much without reciprocal proof. There is no such thing as being too needy. If you are “too needy” you will match best with a partner who is equally needy. But if you don’t watch out, you might miss that person and wind up with a user.

If you happen to be a member at you can at any time contact the admin should you have any doubts in the sincerity of a member. You would be surprised how many times some people not sure and without proof of anything being wrong have done so enabling the administration to take action and remove such individual based on the amount of similar information provided.

Are you shy?

There is nothing wrong with being shy, careful and wanting to move things slowly.

Shyness is instinctive and there is nothing wrong with being shy. If you are not shy enough, you will potentially lose yourself in others. So don’t necessarily try to overcome something that is simply a normal reaction to the world I have just described above.

Never allow yourself to be bamboozled or to be talked into something you are not comfortable with.

Communication is king. Communication is key!

And we believe that blood types and compatibility go hand in hand. You need to find out your blood type first though before you can register for free and search for a potential partner who shares your blood type.

Imagine a world where people can see through each others and nobody makes mistakes based on being deceived and miscommunicating. We believe that when you choose someone compatible by blood type, exactly this becomes the case.

Wishful thinking and fantasyworlds are our taboos because we believe reality is more exciting than fiction.

We hope this article has helped you and will help many avoid making mistakes. Mistakes close doors to blessings. And when we eliminate the bad, the good has a gate wide open. And if you can think of how we can improve our free service to make things easier for everyone, please drop us a line. We are also on Facebook and Twitter. So do not hesitate to let us know!

Find THE piece that fits.

And don’t forget: You have the choice to keep your dating profile either public or make it private so that only potential matches can view you!

Hope to be of service!

Your Datebytype Team!

To be continued …


How to find out your blood type

The only requirement in our dating site is that you know your blood type. You can search a potential partner based on blood type and you can be found by the same criteria. A lot of people are completely unaware of their own blood types, so we hope our service will inspire more and more people to find out theirs.

Here are 3 easy ways to find out your blood type:

1) Call your physician or hospital where you have been cared for.

Your blood type is usually on file somewhere, but unless you ask for it, normally the doctors won’t bother telling you. Simply give them a call and ask them to look it up. This turns out to be the easiest way generally speaking.

2) Donate blood

Before you do, read Is Donating Blood Right For You? first. Generally speaking, there is a health benefit to it. But in some cases, a serious health risk is being attached to it. Make sure that you are right for donating blood and donating blood is right for you and I also advise you to contact your personal physician aside from the doctor working for the donation center.

3) Order a testing kit

You can order one here or search Google for Eldoncard or other services. Some new ones are even cheaper and easier and more are coming out. By the time you read this post, you might have found a better option which I hope you will share below in form of a comment.


Human error and other reasons can cause your test results to be inaccurate. Make sure that you look at 4 major reasons why blood type tests can show different results should there be variations.

As soon as you know your blood type, you are free to register at Datebytype. And through your blood type, members can find you here where you as well will be able to find potential partners or friends based on their blood types.


High-altitudes and blood types

When looking at mountain trekking, high-altitude climbing you need to know that there is a predisposition based on your blood type determining whether or not this type of adventure is something that you are likely going to do well in.
At first let’s look at ancestry in order to get some hints whether or not it is in your nature to participate in such a sport.

Let’s say you’re blood type …

A people are the least likely to do well. A people are the descendants of the first farmers living a relaxed, planned-out life without too many surprises. Taking risks is not in the nature of blood type A people. Usually low-altitude locations tend to be the homes of the ancestors of blood type A people. Under stress, blood type A people tend to easily panic which is never a good thing in situations where every decision counts.
If you are blood type A and planning to go to the Himalayas, prepare yourself as follows:

– Don’t only plan the trip. Prepare mentally and visualize your adventure.
– Force yourself to spend a few hours a week preparing. Be it Yoga, meditation or swimming while concentrating on training yourself to hold your breath for a long time. Anything you think you should do to make you feel ready for the quest is advised to do.

Double exposure portrait of woman performing yoga asana reflects unity of human and nature

Double exposure portrait of woman performing yoga asana reflects unity of human and nature

– Activate your intuition. It helps us survive. The inner antenna will lead you when the map is lost or there is no GPS.

Your oxygen supply is based on adrenaline or lack thereof. And that is based on your inner state. Do you really want to climb through the mountain ranges? Then ask yourself first why. If a sufficient answer is found, never lose focus of that reason or goal.
Blood type A people tend to do well when determined, but this determination needs to be found within. You don’t have to be a natural at anything or love it for it to grow on you eventually.
Do not assume you can just do something and be good at it right away. Take your time, absorb feedback, watch what others do and how they do it.

Then pick a date a while ahead and continue not just with the focus on your goal, but also the reward after which you will have to visualize while on your quest.

Blood type O people are the natural born hunters. Their goal: Get the meat.
When it comes to long-term excursions however, blood type O people tend to not do as well.
Blood type O people however are the most intuitive. So the key is to only face on the reason you really want to do mountain climbing. Then keep your eyes on that if you believe the goal is worth it. The rest will come when it comes.

Under no circumstances continue your journey, should you ever doubt that you should do it.

Prepare yourself as follows:

Be good to yourself. Simple as it sounds. You need positive energy to make it through. The physical strain can be bypassed easily by simply developing the right technique for your own body and state of mind. But you need to be centered. And when you are, you will find a way to make it through and do very well.

B people are mind over matter. And not only that. Said to have originated in the Himalayas, blood type B is associated with a strong will. Your will is already there. SO now the key is to focus on the physical aspects.
Train endurance, long-distance running might be great. Swimming as well as hitting the gym and focusing on related movements such as pull-ups.


“Living in both worlds”, AB people have to simply ignore one side, the one that wants relaxation and planned-out and predictable lifestyles. In order to properly prepare yourself for the quest, give “the other side” what is craved for the time before trekking and treat yourself to as much stress-free life as you possibly can. It is within you to do well when mountain trekking, so do not worry about not making it.
Do some training and don’t allow yourself to get sidetracked.


Knowing your blood type means knowing your health

I have recently published Are you a traveller with a rare blood type? in order to highlight the importance of knowing your blood type, as there have been travellers in deep trouble having a rare blood type and not being able to or having a very hard time finding a compatible donor in countries where their type is even more seldom.

But did you know that you could also be visiting a country where certain diseases are easier for you to get and affect you much worse than others if you have a certain blood type?

You don’t have to be a believer in the association between blood types and personality traits in order to want to know your blood type. Blood types and general health are strongly associated which is being proven by more and more studies.
The examples are endless and here are some of them to let you know the risk for you according to your blood type:

Diabetes: This study is unique in terms of including the rh factor which is usually being overlooked. According to it, blood type O negatives are much less at risk while people who are B positive are the highest.

Malaria: Blood type O is protected more than the others. A seems to be affected the worst.

Stomach Cancer

More bad news if you’re blood type AB: Your risk for stomach cancer is roughly 26% higher than if you had blood type B or O, concludes a study from the American Journal of Epidemiology. (If you’re type A, your risk is 20% higher than those with type B or O.)

More here …

A few more examples are being highlighted in the following video:

Overall people with the rhesus negative blood factor appear to be affected the worst by illnesses in general.

What we are now learning more and more about as well are mental health issues and their relationship to blood types.
Here are a few examples:

Suicide: Studies have shown a high number of people with blood type A amongst those who have killed themselves. Low in B and O.

Criminal activities:

Murder: A high percentage of people with blood types B and O. Low in A.

Now wait a second:

People consider it far-fetched to assume that blood types and personality traits are in any way related. But if mental health is being associated with blood types, wouldn’t mental health in general be associated with predispositions and therefore so closely related to personality traits in general that a relationship between the two would have to be there?


Does your blood type impact your personality?

Is it just me or are more and more people paying attention to this?


Thanks to the internet, more lives are being saved

Here is the latest example:

A man having a rare blood type in southern Vietnam who was admitted to hospital in a critical condition has been saved by a British donor after his grave state was described on Facebook by a medical worker.

blood type

More here:

Briton donates rare-type blood to save Vietnamese man