Question

Foetal ejection reflex in human female is induced by :

• A. Release of oxytocin from pituitary
• B. Pressure exerted by amniotic fluid
• C. Differentiation of mammary glands
• D. Fully developed foetus and placenta

Answer 1

The Correct Option is D

The foetal ejection reflex is an essential biological process that occurs in the human female during childbirth. Understanding this reflex involves recognizing the physiological changes and signals associated with labor.

Let's analyze the options provided:

1. Release of oxytocin from the pituitary: Oxytocin is indeed released from the pituitary gland, which stimulates uterine contractions during labor. However, its release is a response to the initiation of labor and not the primary cause of the foetal ejection reflex.
2. Pressure exerted by amniotic fluid: While the amniotic fluid can exert pressure, it primarily acts to cushion the baby and does not directly induce the reflex leading to childbirth.
3. Differentiation of mammary glands: This process is more related to preparing the mother for breastfeeding rather than initiating labor.
4. Fully developed foetus and placenta: This is the correct answer. The presence of a fully developed foetus and placenta triggers the release of specific hormones and signals that prepare the body to undergo labor. The distension of the uterus due to the fully grown foetus stimulates stretch receptors, which play a crucial role in initiating the foetal ejection reflex.

Conclusion: The foetal ejection reflex is primarily induced when the foetus and placenta are fully developed. This development signals the body to start the process of labor, during which the hormone oxytocin is released to enhance uterine contractions, thus aiding in childbirth. Hence, the correct answer is "Fully developed foetus and placenta."