Hormones secreted by human placenta are

A. human chorionic gonadotrophin (hCG)
B. human placental lactogen (hPL)
C. estrogen and progesterone
D. Relaxin

1. During fertilization, a sperm comes in contact with the zona pellucida layer and induces the changes in the membrane that block the entry of additional sperm.

2. The milk produced during initial few days of lactation is called Colostrum having antibodies.

3. In human beings, menstrual cycle ceases around 50 years of age. It is called menopause.

4. After one month of pregnancy major organ system are formed.

Match Column – I with Column – II.

Match Column – I with Column – II.

The following graph of relative concentrations of the four hormones present in the blood plasma of a woman during her menstrual cycle. Identify the hormones.