The expulsion of completely developed foetus from the uterus is known as

Options

A. Ovulation
B. oviposition
C. gestation
D. parturition

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes the expulsion of a fully developed fetus from the uterus.

2. **Identifying the Process**: The process of expelling a fully developed fetus is a significant event in reproduction. This event is commonly referred to in biological terms.

3. **Correct Term**: The correct term for the expulsion of a fully developed fetus from the uterus is **parturition**.

4. **Mechanism of Parturition**: Parturition is triggered by signals from the fully developed placenta and the fetus. These signals are sent to the mother's anterior pituitary gland.

5. **Role of Hormones**: The posterior pituitary gland releases the hormone **oxytocin**, which is crucial for the process of parturition. Oxytocin stimulates uterine contractions, leading to the expulsion of the fetus.

6. **Conclusion**: Therefore, the expulsion of a completely developed fetus from the uterus is known as **parturition**.

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