Not contained in primary follicles A: Primary oocyte B: Follicular cell C: Zona pellucida D: Cumulus

Which of the followings can develope into the embryo?() A: The inner cell mass B: The zona pellucida C: The trophoblast D: The blastocyst cavity E: The morula

Which are essential condition of Implantation? A: The disappear of zona pellucida B: Syncytiotrophoblast is derived from the cytotrophoblast C: The synchronized development of blastocyst and endometrium and function in coordination. D: The pregnant women can produce enough progesterone E: The pregnant women can produce enough estrogen

Which of the following is wrong about the development of fertilized eggs? A: Zona pellucida reaction ensures single egg fertilization B: Egg swims in the fallopian tube and divides twice a day C: Egg moves in the fallopian tube and divides with its volume increasing D: Fertilized egg runs in the fallopian tube for 72 hours E: On the 4th day after fertilization, morula enters the uterine cavity