Trophoblast differentiates at _ post-fertilization day?
Ans. a. 6-8 Explanation: Trophoblast differentiates into cyto and syncytiotrophoblast at 6 - 8th-day post ovulation/fertilization. The references are from Gray's anatomy, Langman Embryology, and Moore Embryology.
8-Jun
12-Aug
14-Dec
16-18