Which of the following hormones is released duringdelivery of the baby at the end of pregnancy?a)Prolactinb)Oxytocinc)Glucagond)EstrogenCorrect answer is option 'B'. Can you explain this answer?

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Which of the following hormones is released during delivery of the baby at the end of pregnancy?

a)
Prolactin
b)
Oxytocin
c)
Glucagon
d)
Estrogen

Correct answer is option 'B'. Can you explain this answer?

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Verified Answer

Which of the following hormones is released duringdelivery of the baby...

The correct answer is Oxytocin.

Key Points

Vigorous contraction of the uterus at the end of pregnancy causes expulsion/delivery of the fetus. This process of delivery of the foetus (childbirth) is called parturition.
Oxytocin is released during Parturition in human beings
The posterior part of the pituitary gland also called Neurohypophysis (pars nervosa) releases oxytocin.
Oxytocin is synthesized by the hypothalamus and is transported axonally to the neurohypophysis.
Oxytocin acts on the smooth muscles of our body and stimulates their contraction. In females, it stimulates a vigorous contraction of the uterus at the time of childbirth, and milk ejection from the mammary gland. For this reason, it is also called the birth hormone.

Additional InformationProcess of Parturition:

Parturition is induced by a complex neuroendocrine mechanism.
The signals for parturition originate from the fully developed foetus and the placenta which induce mild uterine contractions called foetal ejection reflex.
This triggers release of oxytocin from the maternal pituitary.
Oxytocin acts on the uterine muscle and causes stronger uterine contractions, which in turn stimulates further secretion of oxytocin.
The stimulatory reflex between the uterine contraction and oxytocin secretion continues resulting in stronger and stronger contractions.
This leads to the expulsion of the baby out of the uterus through the birth canal – parturition
Estrogen, or Oestrogen: It is a sex hormone responsible for the development and regulation of the female reproductive system and secondary sex characteristics.
Glucagon: The α cells of islets of langerhans of pancreas secrete glucagon. Glucagon is released into the bloodstream to prevent blood sugar levels from dropping too low (hypoglycemia)
Prolactin: It is also called lactotrophic hormone. It regulates the growth and milk formation of mammary glands.

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