Oxytocin

Oxytocin is a hormone that also acts as a chemical messenger in the brain. It makes the womb contract in labour, helps milk flow in breastfeeding, and is part of bonding between parents and babies and between partners. It’s often called “the love hormone”, a label that oversimplifies: it can tighten loyalty to your own group as much as warmth.

Also called: the love hormone; the cuddle hormone; the bonding hormone. In hospitals it’s also a medicine.

How it works

It acts on the body and the brain at once. In the body it drives contractions and the milk let-down. In the brain it works alongside dopamine in reward circuits, so that caring for a baby or a partner feels rewarding. The same system runs through parent-infant bonds, couples and friendships, shaped by experience and culture, not by the hormone alone.

Uses

As a medicine, oxytocin is given by injection in a hospital or clinic to start or strengthen contractions during labour and to reduce bleeding after birth. It should only be used to induce labour for a valid medical reason. Nasal sprays exist for research only; they aren’t a treatment to buy.

Why “love hormone” oversimplifies

In five placebo-controlled experiments, men given oxytocin favoured their own group more and, to a lesser extent, looked down on outsiders. That’s loyalty, not universal love. Hopes that it could treat autism or social anxiety haven’t held up: across 42 trials with 1,922 people, a 2026 review found a small, non-significant effect on symptoms overall, and 12 autism trials with 733 people found no effect on social functioning.

In Nigeria

You’ll meet the hormone in the labour ward. Bonding isn’t a chemical switch. A new mother who feels flat or distant isn’t short of a hormone; she may be exhausted, unsupported or depressed, and that’s treatable. Our guide to postpartum depression explains the signs.

Oxytocin vs serotonin

Serotonin is a messenger involved in mood, sleep and appetite, and the target of common antidepressants. Oxytocin is about contractions, milk and social bonds.

When to get help

If you feel disconnected from your baby, your partner or people generally, and it’s lasting, talk to someone rather than looking for a hormone fix. You can book a licensed therapist on Mytherapist.ng for family and parenting therapy or couples counselling.