You can usually start collecting colostrum in the late third trimester, most commonly from around 36–37 weeks of pregnancy, but only after checking with your midwife or doctor.

Quick scoop

  • Many hospital and breastfeeding guidelines suggest starting antenatal colostrum collection at about 36 weeks of pregnancy if your pregnancy is low risk.
  • Some providers say “from 36 weeks,” others “from 36–37 weeks,” and a few mention 37 weeks or later, so the exact week can vary slightly by guideline and by country.
  • Expressing earlier than 36 weeks is generally not recommended unless specifically advised, because nipple stimulation can theoretically trigger contractions in some people.

When you might be asked to start

Health professionals may especially suggest antenatal colostrum collection if:

  • You have diabetes in pregnancy (to help baby’s blood sugars after birth).
  • You’re planning a caesarean or induction and there’s a chance of early separation from baby.
  • Your baby is expected to need neonatal care or has certain conditions.

In these cases, a midwife, obstetrician, or lactation consultant usually gives a clear “start from X weeks” plan (often 36 weeks).

How often and how long

Typical advice for low‑risk pregnancies once you reach 36–37 weeks:

  1. Start with hand expressing once a day for a few minutes.
  2. Gradually increase to 2–5 short sessions per day, about 5–10 minutes each breast, as comfortable.
  3. Collect drops into small syringes and freeze for use after birth if needed.

Important safety notes

  • Always talk to your own provider before starting, especially if you have a history of preterm labour, bleeding, placenta previa/low‑lying placenta, or a cervical stitch.
  • If you notice painful tightenings, bleeding, fluid loss, or reduced fetal movements after expressing, stop and get urgent medical advice.

Bottom line

For most uncomplicated pregnancies, “when can I start collecting colostrum?” is answered with: around 36 weeks , after you’ve cleared it with your midwife, OB, or lactation consultant and received instructions that fit your specific situation.

Information gathered from public forums or data available on the internet and portrayed here.