Sexual maturity begins in females at ________.

Options

A. Puberty
B. Neonatal stage
C. Ovulation
D. Menstruation

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks about the stage at which sexual maturity begins in females. This is a key concept in the study of reproduction in animals.

2. **Identifying Relevant Terms:** The term "sexual maturity" refers to the stage in life when an organism is capable of reproduction. In females, this is often associated with the onset of menstruation and the development of secondary sexual characteristics.

3. **Considering the Options:**
- **Puberty:** This is the period during which adolescents reach sexual maturity and become capable of reproduction. In females, this is marked by the start of menstruation and the development of breasts and pubic hair.
- **Neonatal Stage:** This refers to the first few weeks after birth, where the organism is still considered a newborn and not yet sexually mature.
- **Ovulation:** This is a part of the menstrual cycle where a mature egg is released, but it does not define the beginning of sexual maturity.
- **Menstrual Phase:** This refers to the cyclic process of menstruation but does not indicate the onset of sexual maturity.

4. **Conclusion:** Based on the definitions and explanations of the terms, the correct answer is "puberty," as it is the stage where females begin to exhibit sexual maturity.

5. **Final Answer:** Sexual maturity begins in females at **puberty**.

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