The male cells may come from someone the woman knows, or they may be from an unknown donor.

精子可能来自女性认识的人，也可能来自匿名捐精者。

Presumably, female cells (and therefore the plaques of female brains) make more of it than male cells do.

据此推测，女性细胞（包括女性大脑中的斑块）比男性细胞分泌更多的妊娠带蛋白。

She said the researchers developed a very smart method for changing male stem cells to female stem cells.

她说，研究人员开发了一种非常聪明的方法，可以将雄性干细胞转变为雌性干细胞。

Ostracods are still around today, and many species seem to share this ability to create enormous male sex cells.

介形虫今天仍然存在，许多物种似乎都具有这种创造巨大雄性性细胞的能力。

In vitro fertilization is when doctors combine male and female cells to create an embryo, which is later implanted in a woman's uterus.

体外受精指医生将精子与卵子结合形成胚胎，随后将其植入一名女性的子宫中。

In Klinefelter syndrome, the sex chromosome pairs which is either XX or XY don't separate in meiosis I in the male or female germ cell and this resulted in two gametes with a pair of X chromosomes and two gametes without X chromosomes.

Klinefelter综合征中，配对的XX或XY性染色体对在父亲或母亲的第一次减数分裂中没有分离，从而产生了两个有两条X染色体的配子以及两个没有X染色体的配子。