Question:
Which hormone is primarily responsible for the relaxation of pelvic ligaments during childbirth?
Which hormone is primarily responsible for the relaxation of pelvic ligaments during childbirth?
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Relaxin = Relaxation of ligaments.
It helps widen the pelvis for smooth delivery.
It helps widen the pelvis for smooth delivery.
Updated On: Apr 23, 2026
- Estrogen
- Progesterone
- Relaxin
- Oxytocin
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The Correct Option is C
Solution and Explanation
Concept:
During pregnancy and childbirth, certain hormones prepare the female body for delivery. One crucial requirement is the relaxation and loosening of pelvic ligaments to allow the passage of the baby through the birth canal. This function is mainly carried out by the hormone relaxin, which is secreted by the ovaries and placenta.
Step 1: Understanding the role of hormones in childbirth
Different hormones perform specific roles:
• Estrogen: Promotes growth of reproductive organs.
• Progesterone: Maintains pregnancy by supporting the uterine lining.
• Oxytocin: Stimulates uterine contractions during labor.
Step 2: Identifying the hormone responsible for ligament relaxation
Relaxin specifically acts on the pelvic ligaments and pubic symphysis, making them more flexible. This increases the diameter of the birth canal, facilitating childbirth. Conclusion:
Thus, the hormone responsible for relaxation of pelvic ligaments during childbirth is relaxin.
During pregnancy and childbirth, certain hormones prepare the female body for delivery. One crucial requirement is the relaxation and loosening of pelvic ligaments to allow the passage of the baby through the birth canal. This function is mainly carried out by the hormone relaxin, which is secreted by the ovaries and placenta.
Step 1: Understanding the role of hormones in childbirth
Different hormones perform specific roles:
• Estrogen: Promotes growth of reproductive organs.
• Progesterone: Maintains pregnancy by supporting the uterine lining.
• Oxytocin: Stimulates uterine contractions during labor.
Step 2: Identifying the hormone responsible for ligament relaxation
Relaxin specifically acts on the pelvic ligaments and pubic symphysis, making them more flexible. This increases the diameter of the birth canal, facilitating childbirth. Conclusion:
Thus, the hormone responsible for relaxation of pelvic ligaments during childbirth is relaxin.
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