Does Expressing Colostrum Increase Milk Supply?

Posted on February 23, 2026

Introduction
Understanding Colostrum: The Liquid Gold
Does Expressing Colostrum Before Birth Increase Supply?
Why You Might Consider Colostrum Harvesting
When Is It Safe to Start Expressing?
How to Harvest Colostrum: A Step-by-Step Guide
Managing Your Expectations
Establishing Supply After Baby Arrives
Common Myths About Colostrum and Supply
Building Your Confidence
Conclusion
FAQ

Introduction

The final weeks of pregnancy are often a whirlwind of nursery preparation and nesting. You might find yourself researching every possible way to give your baby a healthy start. Lately, the practice of "colostrum harvesting" or expressing milk before birth has gained a lot of attention. Many expectant parents wonder if this early effort can give their future milk supply a boost.

At Milky Mama, we know that the transition into breastfeeding can feel both exciting and overwhelming. We are here to provide the clinical expertise and supportive guidance you need to feel empowered. In this post, we will explore the science of colostrum and whether expressing it early actually impacts your long-term supply. We will also discuss how this practice can benefit both you and your newborn in those first critical days.

Understanding the "why" and "how" behind this technique helps you make the best choice for your unique journey. Whether you are a first-time parent or an experienced pro, we want you to feel confident in your body's amazing abilities. Every drop counts, and your dedication to your baby's nutrition is truly inspiring.

Understanding Colostrum: The Liquid Gold

Colostrum is the very first stage of breast milk. Your body begins making it during the second trimester of pregnancy. This initial milk is often called "liquid gold" for two main reasons. First, it frequently has a deep yellow or orange hue. Second, it is incredibly valuable for a newborn's health.

Unlike the thinner, whiter mature milk that arrives later, colostrum is thick and concentrated. It is packed with proteins, vitamins, and minerals. It also acts as a baby’s first "vaccination." It contains high levels of antibodies, specifically Secretory Immunoglobulin A (SIgA). These antibodies coat the lining of your baby's gut. This creates a protective barrier against pathogens and bacteria.

Beyond immune support, colostrum has a natural laxative effect. This helps your baby pass their first stool, known as meconium. Clearing meconium quickly is vital for reducing the risk of newborn jaundice. It helps the body process and remove bilirubin. Even in tiny amounts, colostrum provides exactly what a newborn needs for their small stomach.

Does Expressing Colostrum Before Birth Increase Supply?

The most common question regarding prenatal expression is whether it increases your eventual milk volume. The short answer is no. Expressing colostrum during pregnancy does not biologically increase the amount of mature milk you will produce later. This is because milk production happens in distinct stages.

For additional perspective, read Milky Mama’s guide to collecting colostrum and milk supply.

The Role of Hormones in Pregnancy

During pregnancy, your body is in a phase called Lactogenesis I. At this stage, milk production is entirely driven by hormones. High levels of progesterone produced by the placenta keep your milk supply in check. Progesterone prevents your breasts from making a high volume of milk.

Because this phase is hormonal, your "full" milk supply will not come in until after birth. The delivery of the placenta triggers a sharp drop in progesterone. This shift signals your body to move into Lactogenesis II. This is when your milk "comes in" and increases in volume. Nothing you do before birth can change this specific hormonal timeline.

Indirect Benefits for Your Supply

While expressing colostrum doesn't change your biological milk volume pre-birth, it can indirectly support your supply.

Skill Acquisition: You learn the technique of hand expression while you are still pregnant. This makes you much more confident after birth.
Confident Feeding: If your baby has trouble latching initially, you can immediately express colostrum to feed them. This keeps the "demand" signal going in your body.
Reduced Stress: Knowing you have a backup supply can lower your stress levels. High stress can sometimes inhibit the let-down reflex.

Key Takeaway: Harvesting colostrum won't biologically change your long-term milk volume. However, it equips you with skills that protect your supply during the delicate first few days.

Why You Might Consider Colostrum Harvesting

If it doesn't boost volume, you might wonder why many lactation experts recommend it. The benefits are primarily about safety, health, and confidence. Having a small stash of colostrum can be a lifesaver in specific situations.

A Safety Net for Medical Needs

In some cases, a baby may need a little extra help with their blood sugar levels. Babies born to parents with diabetes are at a higher risk for low blood sugar (hypoglycemia) after birth. If you have a stash of colostrum in the hospital freezer, the staff can give that to your baby. This helps avoid the need for formula supplementation if your goal is exclusive human milk feeding.

Support for Planned C-Sections

Sometimes it takes slightly longer for milk to "come in" after a surgical birth. This is often due to a delay in skin-to-skin contact or the physical stress of surgery. Having colostrum on hand provides peace of mind. You know your baby is getting vital immune protection even if the first few latches are a struggle.

Preparing for Separation

If your baby needs to spend time in the Neonatal Intensive Care Unit (NICU), you may be temporarily separated. Having expressed colostrum allows the hospital staff to feed your baby your milk immediately. This is especially helpful if you are still recovering from a difficult birth and cannot physically be with your baby for every feed.

When Is It Safe to Start Expressing?

Safety is always the top priority when it comes to prenatal expression. You should never start harvesting colostrum without talking to your healthcare provider first. Most clinical guidelines suggest waiting until you are at least 36 or 37 weeks pregnant.

The Oxytocin Connection

The reason for this waiting period involves the hormone oxytocin. Nipple stimulation and breast expression release oxytocin. This is the "love hormone" that helps move milk through the ducts. However, oxytocin is also responsible for uterine contractions.

In a healthy, low-risk, full-term pregnancy, the amount of oxytocin released is usually not enough to start labor. However, we always want to be cautious. If you have a history of preterm labor or other complications, your doctor may advise against it.

Who Should Avoid Antenatal Expression?

You should likely avoid colostrum harvesting if you have a history of:

Preterm labor.
Cervical incompetence or a cervical stitch.
Placenta previa or other placental complications.
Excessive amniotic fluid (polyhydramnios).

If you feel any tightening in your uterus or "period-like" cramps while expressing, stop immediately. Rest and see if the sensations go away. If contractions continue, contact your healthcare provider right away.

How to Harvest Colostrum: A Step-by-Step Guide

Harvesting colostrum is done using hand expression, not a breast pump. Electric pumps are designed for larger volumes of thinner milk. Colostrum is thick and produced in tiny amounts. It would likely get lost in the pump parts and tubing.

For more instruction, explore this hand expression guide.

What You Will Need

Clean hands.
Small, sterile oral syringes (1ml or 2ml are best).
Labels and a permanent marker.
A clean cup or spoon (to catch any stray drops).
A zip-lock bag for storage.

The Hand Expression Technique

Get Comfortable: Find a quiet place where you can relax. Being warm helps the milk flow. Try expressing after a warm shower or using a warm compress on your breasts.
Massage: Start with a gentle massage. Stroke from the top and sides of the breast toward the nipple. This helps "wake up" the milk ducts.
The "C" Hold: Place your thumb above the areola and your first two fingers below it. Your hand should form a "C" shape. Your fingers should be about an inch or two back from the nipple.
Press and Compress: Gently press your thumb and fingers back toward your chest wall. Then, compress your fingers together in a rhythmic motion. Do not slide your fingers over the skin, as this can cause bruising.
Collect: At first, you might only see a tiny, glistening drop. This is normal! Use the tip of the syringe to "suck up" the drop directly from the nipple.
Rotate: Move your fingers around the "clock" (12 and 6, then 3 and 9) to reach different milk ducts.

What to Do Next

Aim for about 5 minutes per breast, twice a day.
Label every syringe with the date and time.
Store them in the freezer immediately.
You can use the same syringe for a whole day. Just keep it in the fridge between sessions and move it to the freezer at the end of the day.

Managing Your Expectations

Social media can sometimes give us a skewed view of what "normal" looks like. You might see photos of dozens of full syringes. This is not the reality for everyone. Some parents collect only 0.5ml per session. Others might get 5ml. Both are successes.

Remember, your baby’s stomach is roughly the size of a marble on day one. They do not need large volumes. Every single drop you collect is a gift for their immune system. If you find that you cannot express anything during pregnancy, please do not panic. This is not an indicator of how much milk you will have after birth. Many people who cannot express a drop antenatally go on to have a plentiful supply. The hormonal shift after birth is the real engine for your milk production.

You can also read about whether having colostrum is a sign of breastfeeding success.

Establishing Supply After Baby Arrives

While harvesting colostrum helps in the beginning, maintaining a healthy supply is a long-term journey. Once your baby is here, the rules of milk production change. It moves from being hormone-driven to being demand-driven. This is often called the "supply and demand" rule.

Frequent Milk Removal

The more often milk is removed from your breasts, the more milk your body will make. In the first few weeks, your baby should nurse frequently. This is usually 8 to 12 times in a 24-hour period. If you are pumping, frequent sessions are more effective than long, infrequent ones. Each time the breast is emptied, it sends a signal to your brain to ramp up production.

Skin-to-Skin Contact

Keeping your baby close to your skin is a powerful tool. Skin-to-skin contact naturally boosts your oxytocin levels. This helps with the let-down reflex and bonding. It also helps your body recognize that it needs to produce milk for your specific baby.

Proper Nutrition and Hydration

Producing milk takes a lot of energy. Your body needs extra calories and plenty of water to keep up. We recommend keeping a large water bottle with you at all times. Staying hydrated is one of the simplest ways to support your body's natural processes.

For more ideas about nourishment and hydration, see this breastfeeding nutrition guide.

At Milky Mama, we focus on evidence-based ingredients that work with your body. Our Emergency Brownies are a favorite for many of our moms. They provide a delicious way to incorporate supportive ingredients like oats and flaxseed into your diet. We also offer targeted herbal supplements, like our Lady Leche™ or Milk Goddess™, which are formulated to support lactation.

This product is not intended to diagnose, treat, cure, or prevent any disease. Consult with your healthcare provider for medical advice.

Common Myths About Colostrum and Supply

There is a lot of misinformation out there. It can be hard to separate fact from fiction. Let's clear up a few common myths.

Myth: If I don't harvest colostrum, I won't have enough milk.

Fact: Most people throughout history have never harvested colostrum and have successfully fed their babies. This is a helpful tool, not a requirement for breastfeeding success.

Myth: Pumping is better than hand expression for harvesting.

Fact: During pregnancy, colostrum is very thick and comes in small amounts. It will likely get stuck in the parts of a pump. Hand expression is more effective for moving this specific type of milk.

Myth: Harvesting will make me go into labor early.

Fact: For a low-risk pregnancy, the oxytocin released during short hand-expression sessions is generally not enough to induce labor. However, you should always follow your doctor’s specific advice.

Myth: The amount I harvest tells me if I’ll have a "good" supply.

Fact: Prenatal expression is not a "stress test" for your future milk supply. Your body behaves differently once the placenta is delivered and the baby is at the breast.

Building Your Confidence

Breastfeeding is a skill that both you and your baby are learning together. It is okay if it doesn't feel natural right away. Whether you have a freezer full of colostrum or you are starting from scratch on day one, you are doing an amazing job.

If you find that breastfeeding is harder than you expected, reach out for help. Whether it is a virtual lactation consultation or joining a supportive community, you don't have to do this alone. You deserve support, not judgment. Your well-being matters just as much as your baby's nutrition.

Action Steps for Success

Discuss colostrum harvesting with your provider at your 36-week appointment.
Gather your supplies (syringes, labels, bags).
Practice gentle hand expression for 5 minutes once or twice a day.
Focus on frequent milk removal and skin-to-skin contact once baby is born.
Nourish your body with high-quality ingredients and plenty of fluids.

"You are providing your baby with 'liquid gold'—the perfect first food designed specifically for them. Be proud of the work you are doing to prepare for this journey."

Conclusion

So, does expressing colostrum increase milk supply? While it may not biologically increase the volume of your mature milk, it is a wonderful practice for building confidence. It allows you to learn your body’s signals and provides a vital safety net for your newborn. By taking the time to save those precious drops, you are giving your baby a great start and empowering yourself as you enter parenthood.

Whether you manage to save one syringe or twenty, remember that every drop counts. Breastfeeding is a journey of a thousand steps, and this is just one of the first ones you can take. We are here to cheer you on every step of the way.

This product is not intended to diagnose, treat, cure, or prevent any disease. Consult with your healthcare provider for medical advice.

FAQ

Does harvesting colostrum make your milk come in faster?

There is no definitive clinical evidence that harvesting colostrum makes your mature milk "come in" significantly faster. This process is triggered by the delivery of the placenta and the resulting drop in progesterone. However, the stimulation and the skills you gain can lead to a more effective breastfeeding start, which helps the overall transition.

Can I use a breast pump to harvest colostrum?

It is generally recommended to use hand expression rather than a breast pump for colostrum harvesting. Colostrum is produced in very small, thick amounts that often get lost in pump parts like valves and tubing. Hand expression is more effective for gathering every drop and is usually more comfortable during pregnancy.

How much colostrum should I expect to get?

Expectations vary widely from person to person. Most people collect anywhere from a few glistening drops to 5ml per session. It is completely normal to only see a tiny bead of milk at first. These small amounts are highly concentrated and perfectly suited for a newborn's small stomach.

Is it safe to harvest colostrum if I am at risk for preterm labor?

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