( A ) during pregnancy the levels of other hormones like estrogens, progestogens, cortisol, prolactin, thyroxine are increased several folds in the maternal blood.
( B ) In the later phase of pregnancy, a hormone called relaxin is also secreted by the ovary.
( C ) Placenta also acts as an endocrine tissue and produces several hormones like human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogens, progestogens, etc.
( D ) hCG, hPL and relaxin are produced in women even when not pregnant.
