Select the hormone which is not secreted by human placenta ?

The correct answer is Option (4) → Luteinising hormone

Option (1) Estrogen — Secreted by the human placenta.

Option (2) Progestogen — Secreted by the human placenta. It keeps the endometrium for the pregnancy.

Option (3) Human chorionic gonadotropin — Secreted by the human placenta.

Option (4) Luteinising hormone — Not secreted by the human placenta. LH is a gonadotropin of the anterior pituitary; its surge causes ovulation.

NCERT Extract:
Pregnancy and Embryonic Development – “… The placenta facilitate the supply of oxygen and nutrients to the embryo and also removal of carbon dioxide and excretory/waste materials produced by the embryo. The placenta is connected to the embryo through an umbilical cord which helps in the transport of substances to and from the embryo. Placenta also acts as an endocrine tissue and produces several hormones like human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogens, progestogens, etc. In the later phase of pregnancy, a hormone called relaxin is also secreted by the ovary.”