Hormonal Changes During Childbirth

Flashcards covering the hormonal changes during childbirth.

What is the initial trigger for hormonal changes during childbirth?

The fetus's head pushing against the cervix activates stretch-sensitive sensory neurons that send stimulatory signals to the mother's hypothalamus.

What does the hypothalamus stimulate the secretion of?

The hypothalamus stimulates the secretion of oxytocin from the posterior pituitary gland.

What is the role of estradiol during childbirth?

Estradiol from the placenta readies the uterus for a response to oxytocin.

What effect does oxytocin have on uterine contractions?

Oxytocin stimulates stronger uterine contractions.

How do prostaglandins contribute to the process of childbirth?

Prostaglandins secreted by the uterus also enhance contractions. Sensory input to the hypothalamus is further enhanced by contractions.