If 80 % are with the male chromosome, then 40 million female spermatozoa are left, with just one necessary to slip into the ovary and produce a baby girl.
如果血清白蛋白可分離出百分之八十的雄精蟲，其中仍剩有四千萬隻雌精蟲。每次受孕，只有一隻精蟲能「雀屏中選」與卵子結合，四千萬雌性精蟲仍然有不少機會。若雌性精蟲真得到機會，與卵子結合後便會生育女嬰。