animated sequence showing a fertilised egg dividing into two during a process called gastrulation. - 卵子 個影片檔及 b 捲影像00:12
animated sequence showing a sperm successfully entering an egg and the egg creating a hard shell around itself to prevent further sperm from entering it. - 卵子 個影片檔及 b 捲影像00:44
animated sequence showing an ovary ripening and an egg being released into the fallopian tube. - 卵子 個影片檔及 b 捲影像00:30