Parturition is controlled by ................... and ................ hormones.

Explanation

**Step-by-Step Solution:**

1. **Understanding Parturition**: Parturition refers to the process of childbirth, which involves the delivery of a baby from the mother's uterus.

2. **Identifying Key Hormones**: The process of parturition is primarily regulated by two hormones.

3. **First Hormone - Oxytocin**: The first hormone involved in parturition is Oxytocin. This hormone is crucial as it stimulates the contraction of the uterine muscles, helping to push the baby out during childbirth.

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