What causes the onset of labor (Part 2): Fetoplacental Contribution

It involves a cascade of events that involves the fetal-hypothalamic-pituitary-adrenal-axis before the onset of labor. Increase in Corticotropin-Releasing Hormone (CRH) → Increase in release of ACTH→ Fetal adrenals→ increase in cortisol secretion→ acceleration in the production of oestrogen and prostaglandins through the placenta. 

Question: Oestrogen and prostaglandins help in the ripening of the uterus True/False

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