The type of placenta found in human beings is of type

Thalidomide is a non-barbiturate sedative drug which was given to pregnant women. Its use was withdrawn in $1961$ because it resulted in phocomelia. This condition illustrates:

The given figure shows the human foetus within the uterus with few structures marked as $A, B, C$ and $D$. Which of the following options shows the correct labeling?

Placental hormone called chorionic gonadotropin $(HCG)$,which stimulates the secretion of progesterone by the ovary during pregnancy,is:

Which of the following is a correct function of the placenta?

Select the hormones that are produced only during pregnancy.