Most of the neurons you have now in your head, right now, you had when you were in your mother's uterus.

此时此刻,你头脑中的大部分神经元,早在你处于母亲子宫中时,就已经拥有

耶鲁公开课 - 心理学导论课程节选

The Plan B emergency contraceptive pill works by preventing ovulation or by blocking a potentially fertilized egg from becoming implanted in a woman's uterus, according to the drug's label.

WSJ: Corrections & Amplifications

The drug works by using high doses of the female hormone progestin, which also is contained in birth-control pills, to prevent ovulation or block a potentially fertilized egg from becoming implanted in a woman's uterus, according to the drug's label.

WSJ: Judge Eases Restrictions on Plan B Emergency Contraceptive

The cause of pre-eclampsia is unknown, but it is clear that the placenta fails to invade into the wall of the mother's uterus.

BBC: Treatment for pregnancy danger