1 ч 57 мин, 6 ноя 2002 г. - Fertilization
Описание:
Sperm enter the vagina during intercourse and go through the cervix to penetrate the egg that developed during ovulation. A zygote is created that moves throgh the fallopian tubes. The zygote dividides to create more cells to become a blastocyst. The blastocyst then attaches to the uterus.
Добавлено на ленту времени:
seth
Дата:
Изображения:
![]()
