Which one of the following is anti abortion hormone?

Options

A. Relaxin
B. Progesterone
C. Estrogen
D. epinephrine

Answer

To determine which hormone is classified as an anti-abortion hormone, we can analyze the options provided and their functions related to pregnancy.

### Step-by-Step Solution:

1. **Identify the Hormones**: The options provided are Relaxin, Progesterone, Estrogen, and Epinephrine. We need to evaluate each hormone to determine which one is associated with preventing abortion.

2. **Understand the Role of Relaxin**:
- Relaxin is produced by the ovaries and placenta.
- Its primary function is to relax the ligaments in the pelvis and soften the cervix to facilitate childbirth.
- It is not primarily associated with preventing abortion.

3. **Examine Progesterone**:
- Progesterone is a steroid hormone secreted by the corpus luteum.
- It plays a crucial role in the menstrual cycle and maintaining pregnancy.
- Progesterone prepares the uterus for implantation of a fertilized egg and helps maintain the uterine lining.
- If the egg is not fertilized, progesterone levels drop, leading to menstruation. Therefore, high levels of progesterone are crucial for preventing abortion, making it an anti-abortion hormone.

4. **Look at Estrogen**:
- Estrogen is a sex hormone responsible for the development and regulation of the female reproductive system and secondary sexual characteristics.
- While important for overall reproductive health, it is not specifically classified as an anti-abortion hormone.

5. **Analyze Epinephrine**:
- Epinephrine (also known as adrenaline) is involved in the body's fight-or-flight response and is secreted by the adrenal glands.
- It does not have a direct role in pregnancy or preventing abortion.

6. **Conclusion**: Based on the functions of the hormones analyzed, **Progesterone** is identified as the anti-abortion hormone because it maintains the uterine environment necessary for a successful pregnancy.

### Final Answer:
**Progesterone** is the anti-abortion hormone.