Which one of the following is not the function of placenta?

Options

A. Secretes estrogen
B. Facilitates removal of carbon dioxide and waste material from embryo
C. Secretes oxytocin during parturition
D. Facilitates supply of oxygen and nutrients to embryo

Answer

**Step-by-Step Solution:**

1. **Understand the Role of the Placenta**: The placenta is an organ that develops in the uterus during pregnancy. It serves as a connection between the developing fetus and the mother, facilitating the exchange of nutrients, gases, and waste products.

2. **Identify Functions of the Placenta**: The placenta has several key functions:
- It secretes hormones such as human chorionic gonadotropin (hCG), human placental lactogen (HPL), progesterone, and relaxin.
- It facilitates the supply of oxygen and nutrients to the embryo.
- It helps in the removal of carbon dioxide and waste materials from the embryo.

3. **Evaluate the Options Given**: The question asks which of the following is NOT a function of the placenta. The options are:
- Option 1: Secretes estrogen (this is a function of the placenta).
- Option 2: Facilitates removal of carbon dioxide and waste material from the embryo (this is also a function of the placenta).
- Option 3: Secretes oxytocin during parturition (this is NOT a function of the placenta).
- Option 4: Facilitates supply of oxygen and nutrients to the embryo (this is a function of the placenta).

4. **Identify the Incorrect Statement**: Among the options, Option 3 is the only statement that is incorrect because oxytocin is secreted by the posterior pituitary gland, not the placenta.

5. **Conclusion**: Therefore, the correct answer to the question is Option 3, which states that the placenta secretes oxytocin during parturition.