NEET 2021 Biology Paper

● At the end of gestation, the completely developed foetus is expelled out. This process is called parturition.
● Parturition is controlled by a complex neuroendocrine mechanism.
● Estrogen and progesterone ratio increases as estrogen levels rise significantly.
● Prostaglandins, which stimulate uterine contractions are also produced that act on myometrium.
● Oxytocin, the main hormone, also called as birth hormone is released by maternal pituitary, which brings about strong uterine contractions.
● Prolactin is a lactation hormone that has no role in initiation of parturition.