which hormone is called birth hormone

Oxytocin is called the “birth hormone” because it triggers and strengthens uterine contractions needed for labor and delivery. It also helps milk let-down during breastfeeding and supports bonding, but its key role is starting and driving labor.

Why oxytocin is called the birth hormone

• Triggers contractions: Stimulates powerful uterine muscle contractions.
• Starts labour: Contractions initiate the childbirth process.
• Enables delivery: Ongoing oxytocin release sustains contractions to expel the baby.

Other roles

• Milk ejection: Drives let-down during breastfeeding.
• Bonding and wellbeing: Supports maternal–infant bonding and social affiliation.