Colostrum Harvesting Explained: What It Is, When to Start & How to Do It
If you're pregnant and curious about preparing for breastfeeding, you've probably heard the term colostrum harvesting. It sounds clinical, but it's one of the most practical things you can do before your baby arrives — and it takes just a few minutes a day in the final weeks of pregnancy.
What Is Colostrum?
Colostrum is your first milk. Your body begins producing it from around 16–20 weeks of pregnancy, and it's what your baby receives in the first 2–3 days after birth before your mature milk comes in. It's often called "liquid gold" or "baby's first vaccine" for good reason: it's packed with antibodies, white blood cells, growth factors, and concentrated nutrition in a small volume that perfectly matches a newborn's tiny stomach.
What Is Antenatal Colostrum Harvesting?
Antenatal colostrum harvesting (also called antenatal expressing) is the process of hand-expressing small amounts of colostrum from your breasts during the last weeks of pregnancy and storing it in syringes or collection containers. The goal is to have a supply ready to give your newborn if needed in the early hours or days after birth.
Why Would I Need to Harvest Colostrum?
Most mothers don't need a stored supply — your baby can latch and feed directly from birth. But antenatal harvesting is especially recommended if you:
- Have been diagnosed with gestational diabetes (baby may have low blood sugar at birth and need supplemental feeding)
- Are expecting twins or multiples
- Have a history of breast surgery or low milk supply
- Are planning a caesarean section
- Have a baby with a known condition such as a cleft palate or Down syndrome
- Simply want to feel prepared and confident going into birth
When Should I Start?
Most guidelines recommend starting from 36–37 weeks of pregnancy, once your baby is considered full-term. Starting earlier is generally not advised as nipple stimulation can cause contractions, though for most women at term this is not a clinical concern. Always check with your midwife or obstetrician before starting, especially if you have a high-risk pregnancy.
How to Hand-Express Colostrum
- Wash your hands thoroughly.
- Get comfortable — a warm shower beforehand can help with let-down.
- Cup your breast with your hand, placing your thumb above the nipple and fingers below, about 2–3 cm back from the nipple (not right at the edge).
- Press back gently toward your chest wall.
- Compress and release in a rhythmic motion. Don't slide fingers across the skin.
- Collect drops with a sterile 1 ml syringe — even a few drops is a success. Colostrum is very thick and comes in tiny quantities.
- Repeat on both breasts for 5–10 minutes once or twice a day.
Label and date each syringe, and store in the freezer in a sealed bag. Frozen colostrum can typically be stored for up to 3 months.
What to Expect
In the beginning, you may get nothing visible or just a bead of moisture. That's completely normal. Within a few sessions, most women are collecting drops consistently, and by 38–39 weeks some are collecting 0.5–1 ml per session. Don't compare your output to others — every body is different.
Learn in a Guided Workshop
Always harvest colostrum under the supervision of a lactation consultant. Hand expression technique matters. If your positioning is slightly off, you can spend ten minutes with no result — or worse, cause nipple soreness. Our Antenatal Colostrum Harvesting Workshop walks you through the technique step by step, answers your specific questions, and ensures you're set up with the right equipment and storage method before your birth. Many mothers tell us it's one of the best things they did to feel ready.