You can generally start pumping (or more commonly hand expressing) colostrum from around 36 to 37 weeks of pregnancy. It is recommended to use hand expression rather than a pump to collect colostrum before birth, as colostrum is thick and hand expression tends to yield more. However, it is very important to consult your healthcare provider before starting to express colostrum, especially if you have any risks such as preterm labor, low-lying placenta, or any complications during pregnancy. Expressing colostrum early is particularly helpful for women with diabetes, planned cesarean, multiples, or other medical situations where extra colostrum storage can be beneficial. In summary:

• Start hand expressing colostrum around 36-37 weeks.
• Use hands, not a pump, for expressing before birth.
• Always get approval and guidance from your healthcare provider.
• Stop expressing and contact your midwife if you experience contractions or bleeding.

This practice can prepare you for breastfeeding and help provide your baby with the protective benefits of colostrum right after birth.