"Some scientists think whether you're likely to have a girl or boy is inherited through the father, although nobody has identified a gene." I was under the impression that it was the male who decided whether the baby was a boy or a girl, given the whole XX / XY scenario. I can understand how a woman's hormones and other factors can affect a baby in utero but as far as genetic make-up goes, surely it is the man's ratio of male to female sperm that decides rate of male to female offspring?
