Question

The induction of reflex for foetal ejection in human female is caused by
(a) Differentiation of mammary gland
(b) Pressure exerted by amniotic fluid
(c) Release of oxytocin
(d) Fully developed fetus

Answer 1

It is simply the neuroendocrine reflex that involves the supporting pattern of uterine constrictions started by pressure at the cervix or vaginal walls. In biology, it is an example of positive feedback. It occurs in mammals.

Complete answer
Parturition is an induced Complex neuroendocrine mechanism. These signals originate from a fully developed fetus and placenta. This leads to mild uterine contractions and hence fetal ejection reflex. At that point, oxytocin follows up on uterine muscles prompting strong uterine constrictions. This further proceeds to more grounded and stronger contractions. As a result, the baby is expelled out of the uterus with the placenta through the birth canal. The fetal ejection reflex is also called the Ferguson reflex.
Endless supply of strain to the inward end of the cervix, oxytocin is delivered (accordingly increment in contractile proteins), which invigorates uterine contraction, which thus expands tension on the cervix until the child is delivered.
Sensory data with respect to the mechanical stretch of the cervix is conveyed in a sensory neuron, which neurotransmitters in the dorsal horn prior to rising to the cerebrum in the anterolateral segments (ipsilateral and contralateral routes). Through the center forebrain bundle, the difference shows up at the PVN and SON of the nerve center. The posterior pituitary delivers oxytocin because of expanded terminating in the hypothalamo-hypophyseal tract. Oxytocin follows up on the myometrium, on receptors that have been upregulated by a practical increment of the estrogen-progesterone proportion.
This functional proportion change is intervened by a decline in myometrial affectability to progesterone, because of a lessening in progesterone receptor A, and a simultaneous expansion in myometrial affectability to estrogen, because of an expansion in estrogen receptor α.

So the correct answer to the above question is ‘Fully developed fetus and placenta’.

Note:
The idea of cortical impacts gave reasons to bring up issues about the cycle of parturition among people, described by the high encephalization quotient. Odent had seen that, in circumstances that are astoundingly uncommon, ladies can sporadically experience such a reflex, described by a birth after a short arrangement of overwhelming and incredible contractions without any room for voluntary movements. For such a hormonal course to happen, requires adequate mental security, as happens in typical or undisturbed birth.
The higher the intercession rate, for example, enlistment or caesarian segment, the lower the probability of the Ferguson Reflex happening.