For ovulation in reflex ovulators

Options

A. Coitus is necessary
B. Coitus is not necessary
C. Plenty of food is not neceassary
D. Plenty of food is necessary

Answer

### Step-by-Step Solution:

1. **Understanding Ovulation**: Ovulation is the process where a mature egg is released from the ovarian follicle. This process can vary significantly among different species.

2. **Types of Ovulation**: There are two main types of ovulation:
- **Spontaneous Ovulation**: This occurs cyclically, where ovulation happens at regular intervals without any external stimuli.
- **Reflex (Induced) Ovulation**: This type requires specific stimuli, often related to mating or coitus, to trigger the release of the egg.

3. **Mechanism of Reflex Ovulation**: In reflex ovulators, the act of mating or genital stimulation leads to hormonal changes that induce ovulation. This can involve the release of hormones such as GnRH, which stimulates further hormonal activity leading to ovulation.

4. **Role of Coitus**: For reflex ovulators, coitus (mating) is essential for triggering ovulation. The physical act of mating or the presence of seminal fluids can induce the necessary hormonal changes.

5. **Conclusion**: Based on the understanding of reflex ovulation, the correct answer to the question is that coitus is necessary for ovulation in reflex ovulators.

### Final Answer:
**A. Coitus is necessary.**

---