After finding out that women with blood type O were likely of suffering from lower ovarian count, and that type O tended to be protective against cardiovascular problems, I came to wonder whether there was some of natural selection (e.g. among spermatozoa at conception) favouring O blood type for male embryos and A, AB or B blood type for female ones ?
I have noticed that among my relatives and friends women were far more likely to be A, while men were very often O. I have never heard of a difference of blood type distribution according to gender.
For what it's worth I would like to start a little poll here and see whether my suspicions are confirmed. Thanks for voting.
I have noticed that among my relatives and friends women were far more likely to be A, while men were very often O. I have never heard of a difference of blood type distribution according to gender.
For what it's worth I would like to start a little poll here and see whether my suspicions are confirmed. Thanks for voting.