Colostrum Harvesting – What It Is, Why It Matters, and How to Start Safely

If you’ve reached the third trimester and feel like the baby prep list just keeps growing, I hear you.

But here’s something gentle, quiet, and impactful that doesn’t take over your to-do list: colostrum harvesting.

You may have heard about it in passing. Or maybe someone mentioned syringes and oxytocin and you backed away slowly. This blog will guide you through what it really is, why it can help, and how to do it without pressure or panic, just calm, confident care.

What is colostrum harvesting?

Colostrum harvesting is the process of expressing your first milk (colostrum) during the final weeks of pregnancy, usually from 36 weeks onward, and storing it for use after birth.

It’s done by hand, not pump. It’s low-tech, low-stress, and tailored entirely to you.

Why would I want to do it?

Colostrum harvesting isn’t essential for everyone but it can be incredibly helpful, especially if:

• You want to feel more confident hand-expressing before baby arrives

• Your baby may need support regulating blood sugars after birth

• There’s a chance of separation after birth (e.g. caesarean or special care)

• You’d like a small milk supply ready to top-up feeds, or if baby struggles to latch in those early days

• You simply want to know your body can produce what your baby needs

It’s especially beneficial for parents with gestational diabetes, or those planning for possible interventions during labour.

Will it trigger labour?

This is one of the most common questions I get. The short answer is: not usually.

Colostrum harvesting involves nipple stimulation, which does increase the hormone oxytocin, the same one released during sex and breastfeeding. But on its own, that’s not typically enough to bring on labour. Your body is more sophisticated than a light switch...labour begins when multiple hormonal systems align.

However, if you feel any abdominal tightening or discomfort, always let your midwife know.

How to start colostrum harvesting (gently and safely)

Start small. One session a day. One to two minutes per breast. Increase gradually if it feels good.

How to prepare:

• Find a warm, quiet environment

• Place a warm towel over your chest

• Massage gently to stimulate flow

• Use warm, clean hands

• Express into a clean 1ml syringe (you can add to it throughout the day)

• Store correctly (see below)

This is not a performance. There’s no “target” amount. Some people see a few drops. Some more. Both are valid.

Storage guidelines (simple and clear)

• Fridge: Store at 2–4°C for up to 48 hours

• Freezer: Transfer to a labeled ziplock bag and freeze at –18°C for up to 6 months

• Hospital transport: Use a cool bag with ice packs. Once thawed, use within 24 hours.

Lara’s practical tips:

• Use 1ml capped syringes, they’re small, easy to use and to store

• Label each syringe with name, date, and time

• Keep a few breast pads on hand for surprise leaks

• Always check with your midwife before starting, especially if you have any high-risk factors

Harvesting isn’t about fixing or forcing anything. It’s about familiarity, confidence, and trust, in your body and your care.

And sometimes, just knowing you have a little gold in the freezer can feel like the calmest kind of backup plan.

Would you like my step by step video guide on how to harvest colostrum?

Drop me a message with your email address and i'll send it right over.

Next read: Colostrum & The Early Days – What To Expect From Your Body + Your Baby