Colostrum Harvesting: How to Hand Express Colostrum Before Baby Arrives

If you are in your third trimester and the question of whether breastfeeding will work is already living rent-free in your head, you are not alone, and you are not behind. Colostrum harvesting gives you something calm and concrete to do with that worry. As a speech-language pathologist, IBCLC, and a mom of three who hand expressed before each of my own babies arrived, I want to walk you through it without the overwhelm. 

Here is the short version. Colostrum harvesting is the practice of hand expressing and saving small amounts of colostrum, your baby’s first milk, in the last weeks of pregnancy. For most low-risk pregnancies it is generally started around 36 to 37 weeks, once your provider gives the okay, using your hands only and collecting whatever comes, even if that is just a few drops.

A quick note before we dive in. If you want this in your pocket for later, I put together a free Colostrum Harvesting Guide you can save to your phone and open at 37 weeks when you are ready to start. No pressure, just there if you want it. 

What Colostrum Harvesting Is (and Why It Helps)

Colostrum is the thick, golden first milk your body makes before your mature milk comes in. Your body starts producing it during pregnancy, often well before your due date. It is concentrated, rich in antibodies, and exactly what a brand-new stomach is built for.

One thing I want you to hear early, because so many of the moms I work with worry about it: a common myth is that colostrum is not real milk because it comes in such small amounts. That is not true. In the first days, your baby’s stomach is about the size of a marble, so they do not need large volumes to feel full. Small amounts of colostrum are enough, and they are powerful.

Harvesting just means hand expressing tiny amounts in the last few weeks and freezing them so you have a small stash ready. The why is simple. If your baby is sleepy at the breast, slow to latch, or needs a little top-up in those first hours, you have your own milk ready instead of reaching for formula first. There is a quieter benefit too. Practicing now means you learn how your breasts respond before you are doing it on no sleep. Many moms also describe feeling more confident and prepared going into those early feeds after expressing antenatally.

Is Colostrum Harvesting Safe, and When Should You Start

For most healthy, low-risk pregnancies, hand expressing colostrum is generally started around 36 to 37 weeks. The reason for waiting is that nipple stimulation releases oxytocin, the same hormone involved in contractions, so you want to be close to full term before you begin.

Here is the honest, dual-lens version, because you deserve the real picture. Research on antenatal colostrum expression in women with diabetes has found it to be safe and that it does not increase the rate of preterm birth. That same evidence has not shown that it improves breastfeeding outcomes for everyone, which is why I treat it as a personal, provider-guided choice rather than a must-do. If your pregnancy is low-risk and you plan to breastfeed soon after birth, your body will make colostrum and have it ready for your baby regardless. Harvesting is a helpful tool, not a requirement.

This is the one step I never skip telling moms: talk to your provider before you start. Some situations call for waiting or skipping it entirely.

How to Hand Express Colostrum, Step by Step

Learning how to hand express colostrum takes a little practice, so be patient with yourself the first few times. During pregnancy you use your hands only, no pump.

1. Get warm and relaxed. Oxytocin flows best when you are calm. A warm flannel on your breast for a minute or two, or expressing after a warm shower, can help your colostrum let down.

2. Massage gently. Massage your breast all over for a minute or two to encourage flow.

3. Use a C-shape. Cup your breast with your thumb on top and your fingers underneath, a few centimeters back from the nipple. Press straight back toward your chest, then gently compress your thumb and fingers together and release. Find a rhythm of press, compress, release. Avoid sliding down or pinching the nipple itself.

4. Collect the drops. Colostrum usually comes in drops, not sprays, so have something ready to catch it. A clean spoon, a small cup, or a syringe drawn straight from the nipple all work well.

5. Label and store. Cap your syringe, label it with the date, and freeze it.

How Much Colostrum to Expect

Here is the part I wish every mom heard sooner. A few drops is normal, and a few drops is enough. Some sessions you will get a milliliter or two, some sessions you will get nothing, and both are completely normal.

The amount you collect now does not predict how much milk you will make once your baby is here, and harvesting beforehand will not reduce what your baby gets after birth. Please do not compare your stash to anyone else’s. If you are already thinking ahead about supply, I have a whole guide on how to increase your milk supply once baby arrives. For now, every drop you save is a gift to your future self, and zero drops is not a failing grade.

How to Store Harvested Colostrum and Bring It to the Hospital

Colostrum is breast milk, so you follow standard breast milk storage guidelines. Draw what you collect into a syringe, cap it, and label it with the date.

You can keep it in the back of the fridge short term and freeze it for longer storage. Once frozen colostrum is thawed, use it within 24 hours. When labor starts, pack your frozen syringes in a small cooler or insulated bag with an ice pack. When you arrive, tell your care team you brought colostrum so they can store it and help you use it. It is worth calling your hospital ahead of time too, since some have their own storage guidance.

If you would rather have all of this on one page, the free Colostrum Harvesting Guide lays out the steps, storage, and a hospital-bag checklist in one place.

Where Colostrum Harvesting Pays Off in the First Days

The freezer stash is not really the point. The first days are where it earns its keep, and this is where my SLP and IBCLC lens comes in, because feeding in those early hours is about more than milk.

If your nipples need a break to heal, having colostrum on hand means you can spoon or finger feed your own milk while you keep working on positioning and a deep, pain-free latch. If your baby is sleepy, which is very common in the first day or two, a little colostrum can give them the energy to wake and feed. The same goes for cluster feeding nights and the unexpected, like a baby who needs a small top-up to keep blood sugar steady. This is the piece a lot of articles skip. Harvesting buys you calm, flexible options in the exact moments that tend to rattle new parents, not just a few syringes in the freezer.

Colostrum Harvesting FAQ

Is colostrum harvesting safe?

For most low-risk pregnancies, yes, when it is started around 36 to 37 weeks with your provider’s okay. Because nipple stimulation can trigger contractions, it is not recommended if you have risk factors for preterm birth. Always check with your midwife or OB first.

When should you start colostrum harvesting?

Most moms start around 36 to 37 weeks, once they are close to full term and have provider clearance. Keep sessions short and gentle, about five to ten minutes once or twice a day.

How much colostrum should I collect before birth?

There is no magic number. Drops to a couple of milliliters per session is typical, and a marble-sized newborn stomach does not need much. Even a small amount is worth saving.

Does harvesting colostrum before birth induce labor?

It is very unlikely in a healthy, full-term pregnancy. You may feel mild tightening, which is usually a normal Braxton Hicks contraction. If you have preterm risk factors, this is exactly why you wait and get provider guidance first.

How do you store harvested colostrum?

Label each syringe with the date, refrigerate short term, and freeze for longer storage. Use thawed colostrum within 24 hours, and transport it to the hospital frozen in a cooler with an ice pack.

Will colostrum harvesting affect my milk supply?

No. Expressing small amounts before birth does not use up your colostrum or reduce what your baby gets afterward. Your body keeps making it.

This post is for education and is not medical advice. Colostrum harvesting is a personal decision best made with your own midwife or OB, who knows your pregnancy. Call your provider promptly if you notice regular or painful contractions, vaginal bleeding, leaking fluid, or reduced fetal movement while expressing.

What Matters Most

If you take one thing from this, let it be this. A few drops is enough, and your worth as a mom is not measured in milliliters. Colostrum harvesting can be a beautiful way to feel ready, and a tiny stash, or no stash at all, does not decide whether breastfeeding will work for you and your baby.

If you are reading this with a hospital bag half-packed and a running list of what-ifs, I see you. Preparing to feed your baby can bring up so much, and wanting to feel ready is a sign of how much you already love this little person. Harvest if it brings you peace, skip it if it adds stress, and know that either way your body and your baby are already on the same team. You are more prepared than you think.

You Might Also Like

• Breastfeeding Latch 101: How to Get a Deep, Pain-Free Latch, for comfortable, effective feeds from day one.
• How to Increase My Milk Supply for evidence-based ways to support your supply once baby is here.

Happy harvesting, friend. You’ve got this.