question_answer

Find the incorrect statement w.r.t. pregnancy and embryonic development in humans.

A) Placenta is a functional unit between developing embryo and maternal body formed by interdigitation of chorionic villi and uterine tissue

B) Human chorionic gonadotropin (hCG), human placental lactogen (hPL) and relaxin are produced in women only during pregnancy

C) The inner cell mass contain stem cells which have the potency to give rise to all the tissues and organs

D) By the end of second trimester, the first movements of the foetus and appearance of hair on head is usually observed