Question

Explain how fetal ejection reflex leads to the process of parturition.

Answer 1

Parturition is a neuroendocrine and starts with the signals from the completely developed fetus and placenta that trigger a reflex of fetal ejection.

Complete solution:
The reflex of fetal expulsion is the mild uterine contractions provided by placenta when the fetus is completely developed. During the parturition process, this reaction is observed. The parturition gives signals and mild uterine contractions are induced by placenta. This contributes to the release of oxytocin hormone from the mother's hypophysis (posterior pituitary gland).

Oxytocin is responsible for uterine muscles, inducing more contractions, promoting more oxytocin secretion. The relaxing interaction between the contraction of the uterus and oxytocin secretion is becoming stronger and stronger, leading to the expulsion of the baby from the uterus via the birth canal.

Additional Information:
- Female hormones involved in parturition include: Estrogen plays a key role in uterine contractions.
- Oxytocin assists in uterine contractions at the time of parturition and aids in releasing milk during breastfeeding. Relaxin relaxes and stretches the cervix to the pelvic ligaments.
- Oxytocin is also referred to as the "hormone of love" because it involves lovemaking, pregnancy, contractions during labor and birth, and the production of milk during breastfeeding. It allows us to feel healthy, and it stimulates our emotions and behaviors.

Note:
Fetal ejection reflex is a self-sustained cycle maintained by uterine contraction that is in turn regulated by the pressure developed at the vaginal and cervical walls. It comes under the example of positive feedback in biology.