How to Increase Milk Supply While Still Pregnant

Posted on February 09, 2026

Introduction
Why Milk Supply Changes During Pregnancy
Is It Safe to Breastfeed While Pregnant?
Realistic Ways to Support Your Supply
The Role of Supplements During Pregnancy
Preparing for Colostrum Harvesting
Managing Nipple Sensitivity and Nursing Aversion
The Transition to Tandem Nursing
Action Steps for Your Journey
Conclusion
FAQ

Introduction

Finding out you are pregnant while you are still breastfeeding an older child can bring up a whirlwind of emotions. You might feel excitement for the new addition to your family, but you may also feel a sense of worry about your current nursing relationship. Many mothers notice a change in their milk production almost immediately after that positive pregnancy test. It is a common concern to wonder how to increase milk supply while still pregnant or if it is even possible to maintain your current output.

At Milky Mama, we understand that every drop counts and that the bond you share with your nursing child is incredibly precious. We know that while breastfeeding is a natural process, it does not always feel simple or easy, especially when your body is working overtime to grow a new human being. Our mission is to provide you with the clinical expertise and compassionate support you need to navigate these transitions with confidence.

In this article, we will explore the science behind why milk supply changes during pregnancy and what you can realistically do to support your lactation journey. We will cover nutrition, hydration, and the physiological shifts that occur as your body prepares for a new baby. By understanding how your hormones influence your milk, you can make informed decisions that support your health and the well-being of both your children.

Why Milk Supply Changes During Pregnancy

It is very common for breastfeeding parents to notice a significant drop in milk supply during the first and second trimesters. In fact, research suggests that up to 70% of nursing mothers experience a decrease in volume when they become pregnant. This change is not usually a reflection of your "effort" or how often you nurse; rather, it is a result of the complex hormonal shifts required to maintain a healthy pregnancy.

For additional guidance on this transition, read how to support and increase milk supply while pregnant.

The Role of Progesterone

When you become pregnant, your body begins to produce high levels of progesterone. This hormone is essential for maintaining the pregnancy and helping the fetus grow. However, progesterone is also a natural "lactation inhibitor." During the later stages of pregnancy, progesterone works to prevent your body from producing a full milk supply until after the placenta is delivered.

Once the placenta is out of your body after birth, progesterone levels drop sharply. This drop is the signal for your body to begin the transition from colostrum (the thick, nutrient-dense "liquid gold") to mature milk. While you are still pregnant, those high progesterone levels are constantly signaling your breasts to slow down mature milk production.

The Shift Back to Colostrum

Around the midpoint of your pregnancy—usually between 16 and 22 weeks—your breasts begin a process called lactogenesis I. This is when your body starts producing colostrum in preparation for the new baby. Colostrum is physically different from mature milk; it is lower in volume but incredibly high in antibodies, protein, and minerals.

As this shift happens, your older nursling may notice that the milk tastes different. Colostrum is often saltier and less sweet than mature milk. Some children may naturally begin to wean during this time because they do not like the change in flavor or the slower flow. Others may continue to nurse for comfort, even if they are getting very little milk.

The Feedback Inhibitor of Lactation (FIL)

In a typical breastfeeding relationship, milk removal tells your body to make more milk. This is often called the "supply and demand" rule. However, during pregnancy, the hormonal signals often override the demand signals. Even if you pump more or nurse more frequently, the internal hormonal environment may prevent a significant increase in volume.

Is It Safe to Breastfeed While Pregnant?

A primary concern for many families is whether continuing to nurse will take nutrients away from the developing fetus or cause preterm labor. For the vast majority of healthy, low-risk pregnancies, breastfeeding is considered safe.

Addressing the Oxytocin Concern

When a child nurses, your body releases oxytocin, the hormone responsible for the "let-down reflex" (the release of milk from the breast). Oxytocin is also the hormone that causes uterine contractions during labor. Because of this, some people worry that nursing could trigger early labor.

The good news is that the uterus is generally not very sensitive to oxytocin until the very end of pregnancy. The number of oxytocin receptors in the uterus remains very low until you are close to your due date. Furthermore, the amount of oxytocin released during a typical nursing session is usually much less than what is released during sexual activity, which is also considered safe for most pregnant people.

When to Consult a Professional

While nursing is generally safe, there are specific situations where your healthcare provider or a certified lactation consultant might recommend caution:

If you are carrying multiples (twins, triplets).
If you have a history of preterm labor or late-term miscarriage.
If you are experiencing unexplained uterine pain or bleeding.
If you are unable to gain an appropriate amount of weight for your pregnancy.

If you need personalized guidance about low milk supply, latch concerns, pumping, or breastfeeding difficulties, consider booking a virtual lactation consultation.

If your doctor tells you that you are safe to continue having sexual intercourse, it is very likely that you are also safe to continue breastfeeding.

Realistic Ways to Support Your Supply

While you may not be able to "increase" your supply to pre-pregnancy levels due to the hormonal changes we discussed, you can take steps to support your body and maximize what you are producing.

Focus on Nutrient Density

Growing a baby and producing milk at the same time is physically demanding. Your body will naturally prioritize the developing fetus first, your own health second, and your milk supply last. To support your supply, you must ensure you are getting enough calories and nutrients to cover all three needs.

Most breastfeeding and pregnant mothers need an additional 300 to 500 calories per day on top of their normal intake. Focus on "nutrient-dense" foods—those that provide a lot of vitamins and minerals for every calorie.

Healthy Fats: Avocados, nuts, seeds, and olive oil help provide the energy needed for milk production.
Protein: Lean meats, beans, eggs, and Greek yogurt support tissue growth for both the baby and the mother.
Complex Carbohydrates: Oats and quinoa are excellent choices for maintaining steady energy levels.

For more ideas about nourishing your body while breastfeeding, explore this guide to eating for your breastfeeding journey.

Prioritize Hydration

Hydration is a cornerstone of lactation. When you are pregnant, your blood volume increases significantly, which requires a lot of water. If you are dehydrated, your body will conserve fluids for your vital organs and the fetus, which can lead to a further drop in milk volume.

Aim for at least 80 to 100 ounces of water daily. If plain water feels boring, you can include hydrating fluids that also offer nutritional benefits. Our Milky Melon™ drink mix or Pumpin Punch™ drink mix are popular options for parents looking for a refreshing way to stay hydrated while incorporating lactation-supportive ingredients. These drinks provide the hydration your body craves during pregnancy while supporting your existing supply.

Manage Stress and Rest

Stress produces cortisol, a hormone that can interfere with the let-down reflex. Being pregnant with a young child is inherently stressful and exhausting. Whenever possible, try to prioritize rest. This might mean napping when your older child naps or asking for extra help with household chores. A well-rested body is better equipped to handle the metabolic demands of pregnancy and lactation.

Key Takeaway: You cannot "out-pump" pregnancy hormones. Instead of focusing on volume, focus on nourishing your body with high-quality foods and consistent hydration to support the health of the entire family.

The Role of Supplements During Pregnancy

Many mothers wonder if they can use herbal supplements to boost their supply while pregnant. It is vital to be cautious with herbs during pregnancy, as some can affect uterine tone or hormonal balance.

Choosing Pregnancy-Safe Options

Always consult with your healthcare provider before starting any new supplement while pregnant. Some herbs that are commonly used in lactation, like those found in our Lady Leche™ supplement or Pumping Queen™ supplement formulas, are often considered by many professionals to be supportive of lactation without the use of harsh stimulants.

These supplements are designed to provide your body with the building blocks it needs for healthy milk production. However, because pregnancy hormones are so powerful, supplements may help you maintain what you have rather than causing a massive increase in volume.

Disclaimer: This product is not intended to diagnose, treat, cure, or prevent any disease. Consult with your healthcare provider for medical advice before starting any new supplement regimen while pregnant.

Preparing for Colostrum Harvesting

As you move into the final weeks of your pregnancy, your body will have fully transitioned to colostrum. This is a great time to learn about "prenatal hand expression" or colostrum harvesting.

For more information about the practice, read does harvesting colostrum help milk supply.

What is Colostrum Harvesting?

Colostrum harvesting is the process of gently expressing and collecting the small amounts of colostrum your breasts produce before the baby is born. This is usually started around the 36th or 37th week of pregnancy, with the approval of your healthcare provider.

Why It Helps

Collecting colostrum can be incredibly beneficial, especially if:

You have gestational diabetes.
You have a history of low milk supply.
You are planning a scheduled cesarean birth.
You want to have a "backup" supply of your own milk in case the newborn needs a supplement in the early days.

By practicing hand expression before birth, you also become more familiar with your breasts and how they respond to stimulation, which can give you a head start on breastfeeding your new arrival.

Managing Nipple Sensitivity and Nursing Aversion

One of the biggest hurdles to maintaining a milk supply while pregnant is the physical discomfort. Pregnancy hormones often cause extreme nipple sensitivity, making nursing feel painful or irritating.

Dealing with "Nursing Aversion"

Some mothers experience something called "nursing aversion" or "nursing agitation." This is a sudden, intense feeling of wanting the nursing child to unlatch. It is a physiological response, often driven by hormones and exhaustion, and it does not mean you don't love your child.

To manage sensitivity and aversion:

Check the Latch: Even an older child can have a "lazy" latch. Ensure they are opening wide to minimize friction.
Set Boundaries: If your child is older, you can try "time-limited" nursing sessions. You might use a song or a timer to let them know when the session will end.
Distraction: Use a "nursing necklace" or a small toy to keep the child’s hands busy and prevent them from pinching or pulling.

The Transition to Tandem Nursing

If you choose to continue breastfeeding through your pregnancy, you may find yourself "tandem nursing"—feeding both your newborn and your older child.

For additional perspective, read about tandem breastfeeding and nursing two children.

Will There Be Enough Milk?

A common fear is that the older child will "drink all the milk" intended for the newborn. The human body is amazing; it can produce enough milk for two children of different ages. In the first few days after birth, it is important to ensure the newborn has priority access to the colostrum, as they need those antibodies and the laxative effect to pass their first stools.

The Benefit of an Older Nursling

Having an older child nursing can actually be helpful for your supply once the new baby arrives. An older child has a much stronger suck than a newborn and can help "bring in" your milk more quickly or help relieve engorgement if your newborn is not yet nursing efficiently.

Action Steps for Your Journey

If you are currently navigating pregnancy and breastfeeding, here is a simple plan to help you feel supported:

Talk to your doctor: Ensure your pregnancy is low-risk for continued nursing.
Focus on "The Big Three": Prioritize calories, hydration, and sleep.
Adjust your expectations: Understand that a drop in volume is normal and hormonal, not a sign of failure.
Listen to your body: If nursing becomes too painful or causes significant stress, it is okay to reconsider your goals.
Prepare for the future: Learn hand expression techniques in your third trimester to feel empowered for your upcoming birth.

For structured breastfeeding education, explore the Breastfeeding 101 online course.

Conclusion

Nursing through pregnancy is a journey that requires patience, self-compassion, and a deep understanding of your body’s changing needs. While you may not be able to fully increase your milk supply while pregnant due to the natural rise of progesterone, you can certainly support your health and your nursing relationship through proper nutrition and hydration.

At Milky Mama, we believe that every drop counts, but your well-being matters just as much. Whether you choose to tandem nurse or decide that weaning is the best path for your family, you are doing an incredible job. Your body is performing the miraculous task of nourishing one child while building another.

"Breastfeeding is a natural process, but it doesn't always come naturally—especially when you're navigating the complexities of pregnancy. Focus on nourishing yourself, and trust that your body knows exactly what to do for your growing family."

Your next step is to ensure you are staying hydrated and getting the nutrients you need. Check out our range of lactation-supportive drinks and treats to help keep your energy levels up during this busy time.

FAQ

Is it normal for my milk to change color or taste while I’m pregnant?

Yes, it is very common for milk to become thicker and more yellow as it transitions back to colostrum around the middle of your pregnancy. This change in composition also changes the flavor, often making the milk taste saltier or less sweet, which may cause some children to nurse less frequently or self-wean.

Can I take lactation supplements while I am pregnant?

You should always consult your healthcare provider before taking any herbal supplements during pregnancy. While many ingredients in lactation supplements are safe, some can affect hormone levels or uterine activity, so professional guidance is necessary to ensure the safety of your pregnancy. You can browse the available lactation supplement options while discussing your choices with your provider.

Will breastfeeding while pregnant cause me to lose too much weight?

Breastfeeding and pregnancy both require significant caloric intake, so if you are not eating enough to cover both, you may experience weight loss or fatigue. It is important to work with a nutritionist or your doctor to ensure you are consuming enough nutrient-dense calories to support your own health and the growth of both children.

When will my milk supply return to "normal" after I give birth?

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