Question

What changes are observed in the uterus: 
(i) Subsequent to the implantation of the zygote and 
(ii) If an egg does not get fertilized?

Hint:

If fertilization does not occur, the body goes through the menstrual cycle to shed the unused egg and uterine lining.

Answer 1

- F₂Subsequent to the implantation of the zygote: After the zygote implants in the uterine lining, the uterus thickens and remains prepared to support the pregnancy. Hormones such as progesterone maintain the uterine lining.
- F₂If an egg does not get fertilized: If fertilization does not occur, the uterus sheds its lining during menstruation, and the menstrual cycle continues. The egg is expelled from the body along with the uterine lining.