Find the INCORRECT statement about human reproduction.

Options

A. Hormonal contraceptives are effective with lesser side effects and well accepted by females
B. Primary oocyte completes meiosis - I when sperm enters the cytoplasm of the primary oocyte
C. Spermatogenesis and oogenesis require different temperature
D. Spermatogenesis takes place in seminiferous tubules of testes

Answer

To find the INCORRECT statement about human reproduction, we will evaluate each option provided in the question.

### Step-by-Step Solution:

1. **Evaluate Statement A**:
- "Hormonal contraceptives are effective with lesser side effects and are well accepted by females."
- **Analysis**: This statement is true. Hormonal contraceptives, such as pills, are widely used and generally have fewer side effects compared to other contraceptive methods. They are well accepted by many females.

2. **Evaluate Statement B**:
- "Primary oocyte completes meiosis I when sperm enters the cytoplasm of the primary oocyte."
- **Analysis**: This statement is incorrect. The primary oocyte completes meiosis I during ovulation, not when the sperm enters. The second meiotic division (meiosis II) is completed only after fertilization, when the sperm enters the oocyte.

3. **Evaluate Statement C**:
- "Spermatogenesis and oogenesis require different temperatures."
- **Analysis**: This statement is true. Spermatogenesis occurs in the testes, which are located in the scrotum to maintain a temperature lower than the body temperature (approximately 2.5 degrees Celsius lower). Oogenesis occurs within the female body at normal body temperature.

4. **Evaluate Statement D**:
- "Spermatogenesis takes place in seminiferous tubules of the testes."
- **Analysis**: This statement is true. Spermatogenesis occurs in the seminiferous tubules of the testes, where the germ cells develop into sperm.

### Conclusion:
After evaluating all the statements, the incorrect statement about human reproduction is **Statement B**.

### Final Answer:
**Option B** is the incorrect statement.

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