How to Increase Breast Milk Supply While Pregnant

Posted on March 03, 2026

Breastfeeding Through Pregnancy: How to Support Your Milk Supply

Introduction
The Science of Breastfeeding During Pregnancy
Why Breast Milk Supply Drops During Pregnancy
Can You Actually Increase Supply While Pregnant?
Nutritional Foundations for the Pregnant Nursing Mom
Safe Strategies to Support Your Milk Supply
Supplementing Safely: What to Look For
Managing Physical Challenges
Knowing When to Supplement Your Older Child
Is it Safe to Breastfeed While Pregnant?
Supporting Your Mental Health
Conclusion
FAQ

Introduction

Seeing a positive pregnancy test while you are still breastfeeding your older child can bring up a whirlwind of emotions. You might feel excitement, surprise, or even a little bit of anxiety about how your body will handle the demands of both pregnancy and lactation. It is a unique journey that many parents navigate successfully, often leading to a beautiful experience called tandem nursing, where you feed both your newborn and your toddler.

At Milky Mama, we believe that every drop counts and that you deserve the best possible support during this transition. We know that breastfeeding is natural, but that does not mean it is always easy—especially when your body is busy growing a new human being. This post will explore why your supply changes during pregnancy, how to support your milk production safely, and what you can do to stay nourished throughout these nine months. For personalized guidance, explore Milky Mama’s breastfeeding help and lactation consultations.

Our goal is to provide you with the clinical expertise and compassionate encouragement you need to make the best decisions for your family. Whether you want to maintain your supply until the new baby arrives or you are just looking for ways to stay comfortable, we have you covered. Understanding the hormonal shifts and nutritional needs of this season is the first step toward a successful nursing-while-pregnant experience.

The Science of Breastfeeding During Pregnancy

Many parents wonder if it is even possible to keep a full milk supply once they conceive again. To understand the "how" of increasing or maintaining your supply, we first have to look at the "why" behind the changes you are noticing. Your body is a high-functioning system that prioritizes the most vulnerable member of the family: the developing fetus. You can learn more about milk production and supply changes in Milky Mama’s Milk Supply Guide.

During pregnancy, your body experiences a massive surge in estrogen and progesterone. These hormones are essential for maintaining the pregnancy and helping your baby grow. However, they also have a direct impact on your breasts. Specifically, high levels of progesterone act as a "brake" on your milk production. This is because progesterone inhibits the action of prolactin, which is the hormone responsible for making milk.

Even if you are nursing frequently or using a pump, these pregnancy hormones often override the traditional "supply and demand" rule. In a typical breastfeeding scenario, removing milk tells your body to make more. During pregnancy, the hormonal signal to slow down is often stronger than the signal to speed up. This is a normal, biological process, but it can be frustrating for parents who want to keep their supply high.

Why Breast Milk Supply Drops During Pregnancy

For most women, a noticeable dip in milk supply occurs somewhere between the fourth and fifth months of pregnancy. However, some parents notice a change as early as the first few weeks after conception. This drop is not a sign that you are doing anything wrong. It is simply your body’s response to the changing hormonal landscape.

Around mid-pregnancy, your milk begins to transition back into colostrum. Colostrum is the "liquid gold" or the first milk your body produces for a newborn. It is thick, concentrated, and packed with antibodies and immunoglobulins (proteins that provide immunity). While colostrum is incredibly nutritious, it is produced in much smaller quantities than mature breast milk.

Because colostrum is also higher in sodium and lower in lactose (milk sugar), the taste of your milk will change. It may become saltier and less sweet. This change in volume and flavor is often why older babies or toddlers decide to wean on their own during their mother's pregnancy. They may become frustrated by the slower flow or the different taste.

Can You Actually Increase Supply While Pregnant?

This is the question most parents want answered: can you actually "boost" your supply back to pre-pregnancy levels? It is important to have realistic expectations here. Because the supply drop is driven by hormones rather than just a lack of demand, typical methods like power pumping or nursing more often may not have the same dramatic results they would otherwise.

However, you can certainly support the supply you have and ensure that your body has everything it needs to produce as much milk as possible under the circumstances. Instead of focusing solely on "increasing" volume, we focus on "optimizing" your health and lactation environment. This ensures that you aren't losing supply due to preventable factors like dehydration or malnutrition.

What to Expect With Supply and Demand

In a standard lactation journey, the "let-down reflex"—the process where milk is squeezed out of the small sacs in your breasts—is triggered by the hormone oxytocin. During pregnancy, your body may become slightly less sensitive to these triggers initially, or the hormonal shift may make the let-down feel different. While you can continue to pump and nurse to signal demand, understand that your body is currently prioritizing the baby in your womb.

Key Takeaway: While you may not be able to return to your full pre-pregnancy volume due to hormonal shifts, you can support your current supply through proper nutrition, hydration, and targeted lactation support.

Nutritional Foundations for the Pregnant Nursing Mom

When you are breastfeeding while pregnant, your nutritional needs are significantly higher than average. You are essentially "eating for three": yourself, your nursing child, and your developing baby. If your body is not getting enough calories or nutrients, it will prioritize the pregnancy first, then your own health, and finally, your milk supply. For additional ideas, read Eating for Your Breastfeeding Journey.

To support your supply, you must ensure you are meeting your daily caloric and nutrient goals. Most experts suggest that pregnant, nursing parents need an additional 300 to 500 calories per day on top of their normal pregnancy calorie requirements.

Focus on Nutrient Density

It isn't just about the number of calories, but where they come from. Your body needs specific building blocks to maintain milk production and support fetal growth.

Protein: This is vital for the growth of fetal tissue and the production of milk. Aim for an extra serving of high-quality protein each day, such as lean meats, eggs, beans, or Greek yogurt.
Calcium: Your body will pull calcium from your bones to provide for the baby and your milk if you don't consume enough. Focus on leafy greens, almonds, and dairy.
Iron: Pregnancy and breastfeeding both deplete your iron stores. Low iron can lead to fatigue, which is a known "supply killer."
Healthy Fats: Fats are essential for the caloric density of your milk and for the baby’s brain development.

You can also review Milky Mama’s ingredient guide for information about ingredients commonly used in lactation products.

Hydration is Essential

Hydration is one of the most critical factors in maintaining milk supply. During pregnancy, your blood volume increases significantly, and your body needs extra fluids to manage this. When you add breastfeeding to the mix, your fluid requirements skyrocket.

You should aim for at least 80 to 96 ounces of water a day, but many nursing pregnant moms find they need even more. A good rule of thumb is to drink a glass of water every time you sit down to nurse or pump. If your urine is dark yellow, you are likely dehydrated, which can cause your milk supply to dip further. Milky Mama’s lactation drink mixes can be another option to consider when planning your hydration routine.

Safe Strategies to Support Your Milk Supply

Since the usual "pumping marathons" might be physically exhausting during pregnancy, we recommend a more balanced approach. You want to keep the "demand" signal strong without burning yourself out.

Maintain a Consistent Schedule

If your toddler is still nursing frequently, they are doing the work of signaling your body. If they are nursing less because of the supply drop, you may want to add one or two short pumping sessions to maintain that stimulation. You don't need to pump for 30 minutes; even 10 to 15 minutes can help keep the pathways active. For more pumping guidance, explore this comprehensive pumping guide.

Skin-to-Skin Contact

Skin-to-skin contact releases oxytocin, the "love hormone." This hormone is responsible for the let-down reflex. Even if you aren't getting much milk, spending time cuddling your nursing child skin-to-skin can help encourage your body to release the milk that is there and maintain the emotional bond of breastfeeding.

Manage Stress Levels

Stress is a major factor that can negatively impact milk supply. High levels of cortisol (the stress hormone) can interfere with the hormones needed for milk production. We know that being pregnant while chasing a toddler is stressful! Finding small ways to rest—like lying down while your child nurses—can make a big difference in your overall well-being and your milk supply.

What to Do Next:

Increase your daily water intake by 16–24 ounces.
Add a high-protein snack to your afternoon routine.
Practice 10 minutes of skin-to-skin contact during a nursing session.
Schedule a consultation with an IBCLC if you are worried about your child's growth.

Supplementing Safely: What to Look For

Many parents reach for lactation supplements when they notice a dip in supply. However, pregnancy changes the rules for what is safe to consume. Some herbs that are wonderful for lactation can cause uterine contractions or interfere with pregnancy hormones.

At Milky Mama, we prioritize safety and clinical integrity. Krystal Duhaney, our founder and a Registered Nurse and IBCLC, ensures that our products are formulated with the highest standards. However, because every pregnancy is different, you should always consult with your obstetrician or midwife before starting any new herbal supplement while pregnant.

Hydration and Support

Instead of aggressive herbal galactagogues (substances that increase milk supply), many pregnant moms find success with hydration-based support. Our Pumpin Punch™ drink mix or Milky Melon™ are excellent options for keeping you hydrated while providing essential nutrients. These drinks offer a refreshing way to meet your fluid goals without the stress of swallowing more pills.

Gentle Herbal Support

If your healthcare provider clears you for herbal support, look for gentle ingredients. Some parents use products like Lady Leche™ or Dairy Duchess™ to support their supply. You can compare options in Milky Mama’s lactation supplements collection. These are designed to nourish the body and support lactation, but again, the hormonal "brake" of pregnancy may limit their effectiveness compared to when you are not pregnant.

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

Managing Physical Challenges

Breastfeeding while pregnant isn't just about the milk supply; it's also about your physical comfort. If you are in pain or exhausted, your supply is more likely to suffer.

Nipple Sensitivity

One of the earliest signs of pregnancy is nipple tenderness. For many nursing moms, this makes breastfeeding feel very uncomfortable or even painful. If you are cringing every time your child latches, you might start to subconsciously avoid nursing, which will cause your supply to drop further.

To manage this, ensure your child has a deep, comfortable latch. You can also use cool compresses after nursing or a safe nipple balm to soothe the skin. If the pain is too intense, it is okay to set boundaries. You can limit nursing sessions to a certain amount of time or a certain number of minutes.

Nursing Aversion

Some pregnant women experience "nursing aversion," a sudden, intense feeling of irritability or "skin crawling" when their child nurses. This is a hormonal response and is very common. If you experience this, try distracting yourself during the session with a book or a show. Deep breathing and staying hydrated can also help reduce the intensity of these feelings.

Knowing When to Supplement Your Older Child

Your primary concern is likely the health of your current nursling. Whether or not you need to supplement their diet with formula or other foods depends heavily on their age.

If Your Child is Under 12 Months

If your nursing child is under a year old, breast milk or formula must remain their primary source of nutrition. If your supply drops significantly during pregnancy and your baby is not gaining weight or having enough wet diapers, you will likely need to supplement with infant formula.

You can still nurse for comfort and for the milk you do have, but you must ensure their caloric and nutritional needs are being met. Watch for signs of dehydration or hunger, and stay in close contact with your pediatrician.

If Your Child is Over 12 Months

If you are nursing a toddler, the supply drop is usually less of a nutritional emergency. Most toddlers are eating a variety of solid foods and can drink cow's milk (or a fortified alternative) for their calcium and fat needs. In this case, breastfeeding becomes more about comfort, immunity, and connection.

If your toddler is happy to "dry nurse" (nursing when there is little to no milk), you can continue to do so. Many toddlers don't mind the change in volume or taste and will continue to nurse until the colostrum comes in, or even until the new baby arrives and the mature milk returns.

Is it Safe to Breastfeed While Pregnant?

A common myth is that breastfeeding during pregnancy can cause a miscarriage by triggering uterine contractions. While it is true that nipple stimulation releases oxytocin—which can cause the uterus to contract—for most women with a low-risk pregnancy, this is not a concern.

The amount of oxytocin released during a typical nursing session is generally not enough to cause the cervix to dilate or to trigger labor before the body is ready. In fact, your body has "oxytocin blockers" that protect the uterus during pregnancy.

However, there are certain situations where your doctor may advise you to wean:

If you are carrying multiples (twins or more).
If you have a history of preterm labor.
If you are experiencing unexplained vaginal bleeding or pain.
If you have been advised to abstain from sexual intercourse (which also releases oxytocin).

Always keep an open line of communication with your healthcare provider about your nursing journey.

Supporting Your Mental Health

We know that "every drop counts," but we also know that your well-being matters too. Trying to maintain a milk supply while your body is working overtime to grow a new life can be exhausting. It is okay to feel overwhelmed.

If the drop in supply or the physical discomfort of nursing while pregnant becomes too much, remember that you are doing an amazing job regardless of how long you continue to nurse. Breastfeeding is a relationship, and it has to work for both of you. If you choose to continue, we are here to support you. If you choose to wean, we support that too.

Conclusion

Increasing breast milk supply while pregnant is a unique challenge because of the powerful role hormones play in the process. While you may not be able to counteract the natural biological shift toward colostrum, you can certainly support your body’s ability to produce milk. By focusing on high-quality nutrition, aggressive hydration, and stress management, you provide the best environment for your lactation to continue.

Remember that the changes you are seeing are a sign that your body is doing exactly what it was designed to do—nurture a new life. Whether you continue to nurse through your entire pregnancy or decide to transition your older child to other sources of nutrition, you are providing them with love and care.

"Breastfeeding is a journey of love, and sometimes that journey takes unexpected turns during pregnancy. Listen to your body, nourish your soul, and know that you are doing enough."

If you need extra support, our team at Milky Mama is always here to help. From our lactation-supporting drinks to our community of supportive parents, you don't have to navigate this alone. You can also explore Breastfeeding 101 for additional education and preparation. Take it one day at a time, and keep doing an amazing job.

FAQ

Can I use power pumping to increase my supply while pregnant?

Power pumping can help signal your body to maintain demand, but it may not be as effective as usual due to pregnancy hormones. Progesterone naturally suppresses milk production, so while pumping keeps the "machinery" working, you may not see a significant increase in volume until after you give birth.

Why does my toddler seem frustrated when nursing now that I'm pregnant?

Your toddler is likely noticing two major changes: a decrease in milk volume and a change in taste. As your milk transitions to colostrum, it becomes saltier and less sweet, and the flow becomes much slower, which can be frustrating for a child used to a faster let-down.

Are lactation supplements safe to take while I am pregnant?

Some lactation supplements are safe, but many contain herbs that could potentially affect your pregnancy. You must consult with your healthcare provider before taking any herbal galactagogues while pregnant. Focus on hydration-based products like our Pumpin Punch™ drink mix as a safer first step for support.

Will breastfeeding my older child take nutrients away from the new baby?

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