Which hormone is produced by ovary in the second and third trimester of pregnancy ?

Options

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

Answer

To determine which hormone is produced by the ovary during the second and third trimesters of pregnancy, we can follow these steps:

### Step 1: Understand the role of the ovaries during pregnancy
- During pregnancy, the ovaries play a crucial role in hormone production, particularly in the early stages. However, as pregnancy progresses, the placenta takes over many of these functions.

### Step 2: Identify the hormones produced by the ovaries
- The primary hormones produced by the ovaries include estrogen and progesterone. These hormones are essential for maintaining pregnancy and supporting fetal development.

### Step 3: Focus on the second and third trimesters
- In the second and third trimesters, the role of progesterone becomes particularly important. It helps to maintain the uterine lining and prevents contractions that could lead to premature labor.

### Step 4: Analyze the options given
- The options provided are:
1. Progesterone
2. Estrogen
3. HPL (Human Placental Lactogen)
4. Relaxin

### Step 5: Evaluate each option
- **Progesterone**: Produced by the ovaries and later by the placenta, it is crucial for maintaining pregnancy.
- **Estrogen**: While important, it is not primarily produced by the ovaries during the second and third trimesters.
- **HPL**: Exclusively produced by the placenta, not the ovaries.
- **Relaxin**: Secreted by the placenta, it prepares the cervix for labor but is not produced by the ovaries.

### Step 6: Conclusion
- The hormone produced by the ovaries during the second and third trimesters of pregnancy is **progesterone**.

### Final Answer
- **Progesterone** is the hormone produced by the ovary in the second and third trimester of pregnancy.

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