Topics:
Animal Physiology, Animal Refresher
Hormone Responsible for Uterine Endometrium Preparation for Implantation
The hormone responsible for preparation of uterine endometrium for implantation is:
- Progesterone — Correct Answer
- Estrogen
- FSH
- LH
Explanation:
Correct Answer: Progesterone
Progesterone (also called the 'Pregnancy hormone') is secreted by the Corpus Luteum (CL) of the ovary. It prepares the uterine endometrium for implantation of the fertilized ovum by stimulating endometrial gland development and secretion, and suppressing uterine contractions to maintain pregnancy.
Key Reproductive Hormones and Their Functions
| Hormone | Source | Key Function |
|---|---|---|
| Progesterone | Corpus luteum (ovary) | Prepares endometrium for implantation; maintains pregnancy; alveolar growth of mammary gland |
| Estrogen | Theca interna of Graafian follicle | Estrus/heat behavior; duct system growth of mammary gland; female secondary sexual characteristics |
| FSH | Anterior pituitary | Follicular growth in ovary |
| LH | Anterior pituitary | Ovulation; CL formation; maintains progesterone secretion from CL |
Why Other Options Are Wrong
- Estrogen → Responsible for estrus behavior and development of duct system of mammary gland; it does NOT prepare endometrium for implantation.
- FSH → Stimulates follicle growth; does not act on endometrium directly.
- LH → Triggers ovulation and CL formation; does not prepare endometrium.
📚 About this Topic — Animal Physiology
This multiple choice question is from Animal Physiology, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Physiology to strengthen your preparation.
