What is the source of relaxin?

Explanation

**Step-by-Step Solution:**

1. **Identify the Hormone**: The question asks for the source of Relaxin, which is a hormone involved in pregnancy.

2. **Understand the Nature of Relaxin**: Relaxin is classified as a steroid hormone. This classification is important as it helps us understand its function and source.

3. **Locate the Source**: Relaxin is secreted by the corpus luteum. The corpus luteum is a temporary endocrine structure in the ovaries that forms after ovulation.

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