question_answer

When Vibha got pregnant, she got curious to know more about the intimate connection between her body and foetus. Her doctor told her about placenta that is an integral part between mother and foetus.

(i) Describe the formation of placenta.

(ii) Name the hormones secreted by placenta.

(iii) What values are shown by Vibha's doctor?

Answer:

(i) After implantation, finger-like progections called chorionic villi appear on the trophoplast. These chorionic villi are surrounded by uterine tissue and maternal blood. Later, the chorionic villi and uterine tissue become interdigitated and jointly form the placenta.

(ii) Placenta secretes human Chorionic Gonadotropin (hCG), human Placental Lactogen (hPL), oestrogen and progesterone.

(iii) Vibha?s doctor is devoted to her duties, kind and has professional and moral ethics.