Collecting colostrum with a Spectra pump is possible, but it requires different settings than regular breast milk pumping because colostrum is thick, sticky, and produced in very small amounts. Most people get the best results by combining their Spectra with hand expression, especially in the first few days. Here’s how to set up your pump and what to realistically expect.
Why Colostrum Is Harder to Pump
Colostrum comes out in drops, not streams. On the first day after birth, the average volume per session is about 5 mL, which is roughly one teaspoon. By day two that increases to about 9 mL, and by day three you can expect around 22 mL per session. These tiny volumes can get lost in the tubing and flanges of a standard pump setup, which is why many lactation consultants recommend hand expression first.
A clinical trial comparing hand expression to electric pumping in the first 12 to 36 hours after birth found that both methods produced similarly small volumes: a median of 0.5 mL for hand expression and 1 mL for pumping. Neither method had a clear advantage over the other in those early hours. The practical takeaway is that low output is completely normal, and switching between hand expression and your Spectra can help you collect as much as possible.
Spectra Settings for Colostrum
Spectra pumps (S1, S2, and S9) have adjustable suction and cycle speed, which gives you more control than many other pumps. For colostrum, you want to mimic a baby’s initial quick suckling pattern and then slow down. Start in letdown mode (the faster cycle) for about two minutes to stimulate milk release. Then switch to expression mode with these adjustments:
- Suction level: Start at the lowest setting and increase gradually until you feel a gentle pull that isn’t painful. For colostrum, this is typically between level 3 and level 5. Higher suction won’t produce more colostrum and can cause nipple soreness.
- Cycle speed: Set the cycle speed slower than you would for mature milk. A setting around 38 to 42 cycles per minute works well for the thick consistency of colostrum.
- Session length: Pump for 10 to 15 minutes per breast. If nothing is flowing after 15 minutes, stop and try again later rather than increasing suction.
If your Spectra has a letdown button (the wavy line icon), you can press it again mid-session to trigger another letdown cycle. Some people find that alternating between letdown mode and expression mode two or three times per session helps move colostrum through.
Collecting Small Volumes Without Losing Them
The biggest frustration with pumping colostrum is watching tiny drops coat the inside of your flanges and bottles without ever pooling into a usable amount. A few tricks help with this.
Use a syringe to collect directly. After pumping, disconnect the flange and use a 1 mL or 3 mL oral syringe to suction colostrum out of the flange tunnel, the connector piece, and any surface where drops have settled. Some parents skip the bottles entirely and use a silicone colostrum collector that attaches to the flange, though these aren’t made by Spectra and vary in compatibility.
Another approach is to hand express for a few minutes first, collecting drops into a small spoon or syringe, and then finish with the Spectra once your flow is slightly established. Hand expression uses compression to push thick colostrum forward in a way that suction alone sometimes can’t match in the first 24 to 48 hours.
Pumping Colostrum Before Birth
If you’re trying to pump colostrum before your baby arrives, the practice is called antenatal colostrum expression. It’s typically started around 36 weeks of pregnancy. Clinical trials, including a large Australian study of women with gestational diabetes, have shown that expressing colostrum in late pregnancy does not increase the risk of preterm birth in low-risk pregnancies.
That said, most guidance recommends hand expression rather than electric pumping during pregnancy. The suction from an electric pump can be more stimulating to the uterus, and hand expression gives you better control over the gentle pressure needed to coax out prenatal colostrum, which comes in even smaller quantities than postpartum colostrum. If you do want to use your Spectra before delivery, keep the suction on the lowest effective setting and limit sessions to 5 to 10 minutes.
Antenatal expression is most beneficial when there’s a specific reason to have colostrum stored in advance, such as anticipated low blood sugar in the newborn (common with maternal diabetes), a planned cesarean, or a known condition that might make early feeding difficult. It’s not considered necessary for all pregnancies.
How to Store Collected Colostrum
Colostrum follows the same storage rules as breast milk. At room temperature (77°F or below), it stays safe for up to 4 hours. In the refrigerator, it lasts up to 4 days. In the freezer, 6 months is ideal, though up to 12 months is acceptable.
Because volumes are so small, most people freeze colostrum in syringes rather than bags or bottles. Draw the colostrum into a clean oral syringe, cap it, label it with the date, and lay it flat in the freezer. You can combine colostrum from multiple sessions in the same day as long as you chill the fresh batch in the refrigerator before adding it to already-cold colostrum. Small zip-lock bags work well for keeping labeled syringes organized in the freezer.
When to Expect Your Milk to Transition
Colostrum gradually shifts to transitional milk between days 2 and 5 after birth. You’ll notice the color changing from deep yellow or orange to a lighter, more watery appearance, and the volume will increase noticeably. Once this transition begins, your Spectra will start working more efficiently because the milk flows more freely and collects in the bottles as expected.
During the colostrum phase, pumping 8 to 12 times per 24 hours helps establish your supply for when mature milk comes in. Each session doesn’t need to yield much. Even half a milliliter of colostrum is concentrated with antibodies and nutrients, and the stimulation itself is what signals your body to ramp up production. If you’re finding the pump discouraging in these early days, combining it with hand expression or using hand expression alone is equally effective for signaling your body to make milk.