The placenta acts as an endocrine tissue and produces several hormones. Which of the following hormones is produced in women $ONLY$ during pregnancy?

The gestation period in human beings is about:

The three germ layers—ectoderm,endoderm,and mesoderm—are formed by the division of the embryo. Identify the error in the given statement regarding the process of organogenesis mediated by stem cells.

The corpus luteum secretes ........

Select the correct option describing gonadotropin activity in a normal pregnant female:

The allantois has the similar layers as present in the yolk sac. These are