Antenatal colostrum harvesting

Antenatal colostrum harvesting means hand-expressing and collecting colostrum — the rich “first milk” — in the last weeks of pregnancy, to have a store ready for after your baby is born. It’s something your midwife may suggest in certain situations, and it’s only done on their advice. Here’s what it involves.

What colostrum is. Colostrum is the thick, golden first milk your body makes from before birth — concentrated, packed with antibodies and nutrients, and perfect for a newborn’s tiny tummy. Your body is often already making it in late pregnancy (some people leak a little), which is what makes harvesting possible.

Why it can help. Having a stored supply of colostrum can be useful if your baby might need a little extra in the early days — for example if you have gestational or other diabetes (babies can be prone to low blood sugar), if a baby is expected to need top-ups, or in some other situations your team identifies. It means your own colostrum is on hand, potentially reducing the need for formula top-ups.

Only start on your midwife’s advice. This is the key safety point: don’t begin without guidance from your midwife or doctor. Nipple stimulation releases oxytocin, which can cause contractions, so harvesting is generally only recommended from around 36 weeks and when it’s appropriate for your pregnancy — and it may be advised against if you’re at risk of premature labour or have certain complications. Your midwife will tell you if and when it’s suitable for you, and show you how.

How it’s done. Your midwife will teach you to hand express (pumps aren’t used for this). In brief: wash your hands, get comfortable, gently massage the breast, then compress the areola between finger and thumb in a rhythmic way to release drops of colostrum, catching them in a small syringe. You only get tiny amounts (drops), which is completely normal — colostrum comes in small, precious quantities.

Storing it. Collected colostrum is drawn into labelled syringes, frozen, and you bring it into hospital (in a cool bag) when you go in to have your baby, where it can be stored and used if needed. Your midwife will give you the syringes, labels and exact storage instructions.

If you can’t collect much (or any). Don’t worry — the amount you harvest antenatally says nothing about how much milk you’ll make once your baby arrives, and plenty of people collect little or none. It’s a “nice to have” store, not a test, and your milk supply after birth works completely separately.

Stop and call if. Stop expressing and contact your maternity unit if you notice regular or painful contractions, any bleeding, or your waters break while harvesting. As with anything in late pregnancy, report reduced baby movements straight away.

Antenatal colostrum harvesting can be a helpful head start for babies who might need a top-up early — but it’s a midwife-guided activity, usually from 36 weeks, not something to start on your own. If it’s suggested for you, your midwife will show you exactly how; if you’re curious whether it applies, just ask them at your next appointment.