Which of the following is not the function of placenta in human female

Options

A. Secrets estrogen and relaxin hormone
B. Facilitates supply of oxygen nutrients to embryo
C. Secrets oxytocin hormone during pregnancy
D. It induces foetal ejection reflex for child birth

Answer

To solve the question "Which of the following is not the function of placenta in human female?", we will analyze the functions of the placenta and evaluate each option provided.

### Step-by-Step Solution:

1. **Understanding the Functions of the Placenta**:
- The placenta is a vital organ that forms during pregnancy and serves multiple functions essential for fetal development. It acts as a bridge between the mother and the fetus.

2. **Identifying Key Functions**:
- **Oxygen and Nutrient Supply**: The placenta facilitates the transfer of oxygen and nutrients from the mother to the fetus.
- **Waste Removal**: It also removes carbon dioxide and other waste products from the fetal blood to the maternal circulation.
- **Hormone Secretion**: The placenta secretes several hormones, including estrogen and relaxin, which are important for maintaining pregnancy.

3. **Evaluating Each Option**:
- **Option 1: Secretes estrogen and relaxin hormone**: This is a function of the placenta. It produces these hormones to support pregnancy.
- **Option 2: Facilitates supply of oxygen and nutrients to the embryo**: This is also a function of the placenta, as it is crucial for fetal growth and development.
- **Option 3: Secretes oxytocin hormone during pregnancy**: This is NOT a function of the placenta. Oxytocin is produced by the hypothalamus and released by the posterior pituitary gland, not the placenta.
- **Option 4: Induces fetal ejection reflex for childbirth**: The placenta plays a role in signaling the body for childbirth, making this a valid function.

4. **Conclusion**:
- After analyzing all the options, we find that **Option 3: Secretes oxytocin hormone during pregnancy** is not a function of the placenta. Therefore, the correct answer is option 3.

### Final Answer:
**Option 3: Secretes oxytocin hormone during pregnancy** is not a function of the placenta in human females.

---