How do men determine the sex of a baby?

Answer 1

Embryos are genotypically a boy or a girl at the time of conception. The chromosomes they inherit make them either XX(girl) or XY(boy). Because a female is XX, she will always contribute an X chromosome, but because a male has both, X and Y (XY), the male could either contribute an X chromosome or a Y chromosome.

Answer 2

A baby's sex is determined at conception (when the sperm fertilizes the ovum). The mother's egg provides an X chromosome and the father's sperm determines the baby's sex by contributing either an X or Y sex chromosome. An XX embryo is female while an XY embryo is male. Both female and male embryos develop in exactly the same way. They have identical gonads and genital parts until around the eighth week of gestation.

Answer 3

Because men have chromosomes that are XY- X being female Y being male. Females only have chromosomes that are XX -both which are female. So the male having female and male chromosomes allows the DNA of the fetus to take the same chromosomes of the father (XY) and be a boy or two of the X chromosomes (XX) and be a girl.

Answer 4

You can never tell until a later date but it depends on if the males sperm is x or y type

Answer 5

At around 20 weeks through the pregnancy, an ultrasound or blood test can be done to see if the baby is a boy or a girl

Answer 6

You don't. They are genderless until near maturity.