Question:
Explain the neuroendocrine mechanism involved in the process of parturition in a human female leading to the expulsion of the baby out of the uterus through the birth canal.
Explain the neuroendocrine mechanism involved in the process of parturition in a human female leading to the expulsion of the baby out of the uterus through the birth canal.
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Oxytocin plays a major role in parturition through a positive feedback loop, leading to stronger and more frequent uterine contractions.
Updated On: Jan 13, 2026
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Solution and Explanation
Step 1: Parturition is the process of childbirth, initiated by a complex neuroendocrine mechanism.
Step 2:
Step 2:
- Signals from the fully developed foetus and placenta trigger mild uterine contractions.
- These contractions are sensed by the maternal hypothalamus, which signals the posterior pituitary to release oxytocin.
- Oxytocin causes stronger uterine contractions (positive feedback mechanism).
- These contractions further stimulate oxytocin release, intensifying the process.
- Eventually, this leads to expulsion of the baby through the birth canal.
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