Each human cell contains 23 pairs of chromosomes that carry DNA within their nucleus ... that develop in a person. Female (XX) mammals inherit one X chromosome from each parent, but males ...

The change affects women with atypical genetics who have been able to compete if they suppressed their testosterone levels.

they are created in the female body even before birth and do not renew themselves. Thus, a 30-year-old woman has egg cells that are just as old. The egg cell's ability to repair damage in its DNA ...