Biologist Valeri Grant came to an interesting conclusion. She established that boys are given birth more often by women in which blood level of a man’s hormone testosterone is raised.
Grant started her research in this area 40 years ago. During this time she gave birth to 3 sons and learned how to define a sex of a future child of her girlfriends unmistakably. Valeri even thought up a special test for these purposes, in which course questions were asked: how often do you feel proud, resolute, assured, outcast and malicious.
It appeared that strong and confident women have raised level of testosterone, and they give birth to sons more often. Women whose level of a man’s hormone is lower, are more sensual, careful, patient - they are inclined to give birth to girls.
Grant carried out 6 researches in this area, and recently her theory was recognised as scientifically proved.
