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The signals for parturition originate from:

  1. A
    Fully developed foetus only
  2. B
    Placenta only
  3. C
    Placenta as well as fully developed foetus
  4. D
    Oxytocin released from maternal pituitary

Solution & Step-by-step Explanation

Parturition is induced by a complex neuroendocrine mechanism. The signals for childbirth originate from the fully developed foetus and the placenta, which trigger mild uterine contractions called the foetal ejection reflex.

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The signals for parturition originate from:
A
Fully developed foetus only
B
Placenta only
C
Placenta as well as fully developed foetus
D
Oxytocin released from maternal pituitary

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