How Can I Increase My Milk Supply While Pregnant?

Posted on February 23, 2026

Introduction
The Biology of Breastfeeding During Pregnancy
Strategies for Nursing During Pregnancy
Preparing Your Body for the New Baby
Nutrition to Support Your Future Supply
Setting the Stage for Postpartum Success
Managing Realistic Expectations
Conclusion
FAQ

Introduction

If you are currently nursing a toddler while expecting another baby, or if you are simply looking ahead to ensure a strong start for your newborn, you likely have questions about your milk volume. It is a very common experience for parents to notice their production changing the moment they see that faint second line on a pregnancy test. You might feel a bit of anxiety or wonder if your body can handle the demands of "eating for three" while providing enough for your current nursling.

At Milky Mama, we believe that education is the most powerful tool for any breastfeeding journey. Whether you are navigating a pregnancy supply dip or prepping your body for your first baby, we are here to walk you through the science of what is actually happening. In this post, we will explore the hormonal shifts that occur during pregnancy, how you can support your body through nutrition, and what steps you can take now to ensure your supply is ready when your new baby arrives.

While there are biological limits to how much you can increase milk supply while pregnant, understanding the "why" can help you set realistic goals and feel empowered. Every drop counts, and your well-being matters just as much as the nutrition you provide.

The Biology of Breastfeeding During Pregnancy

To answer the question of how to increase supply, we first have to understand why it usually decreases in the first place. Milk production is a complex process driven by your endocrine system (hormones). When you are not pregnant, your supply is largely governed by "supply and demand"—the more often you remove milk, the more you make. However, pregnancy changes the rules.

The Role of Progesterone

From the moment of conception, your body begins producing high levels of progesterone to support the pregnancy. This hormone is essential for the baby’s growth, but it has a specific side effect: it acts as a natural inhibitor to mature milk production.

Progesterone essentially tells the milk-making cells in your breasts to stay in a "maintenance mode" rather than a "high-production mode." This is why many parents notice a significant drop in supply as early as the first or second month of pregnancy. No matter how much you pump or how often your toddler nurses, these hormonal signals usually override the physical demand.

The Transition to Colostrum

Around the middle of your pregnancy—usually between the fourth and fifth months—your breasts begin a process called Lactogenesis I. This is when your body starts producing colostrum. Colostrum is the thick, concentrated "liquid gold" that is packed with antibodies and nutrients for a newborn.

As your body shifts from mature milk to colostrum, the volume naturally decreases. Colostrum is intended to be delivered in small, powerful doses rather than large ounces. For an older nursling, this shift in volume and taste (colostrum is often saltier) may lead to frustration or even self-weaning. This is a natural biological progression as your body prepares for the arrival of the new baby.

Strategies for Nursing During Pregnancy

If you are breastfeeding an older child while pregnant, you are practicing what is often called "overlap" or "tandem nursing" preparation. While you may not be able to "force" a high volume of mature milk back into production, you can support your body and your current nursling through these changes.

Prioritize Extra Calories

Growing a baby and producing milk at the same time is hard work. Your body will prioritize the developing fetus first, then your own physical needs, and finally your milk supply. If you are not eating enough, your supply will be the first thing to suffer.

Many lactation experts recommend adding an additional 500 to 800 calories to your daily intake when you are nursing during pregnancy. Focus on nutrient-dense foods like:

Avocados and nuts for healthy fats.
Lean proteins like eggs, chicken, or beans.
Complex carbohydrates like sweet potatoes and quinoa.

For more ideas, explore this guide to nourishing your body during your breastfeeding journey.

Hydration is Essential

Breast milk is about 87% water. When you are pregnant, your blood volume increases significantly, and your body needs more fluids than ever to maintain amniotic fluid levels and keep you hydrated. Dehydration is a common cause of a temporary dip in supply.

We recommend drinking to satisfy your thirst, plus a little extra. A good habit is to have a glass of water every time you sit down to nurse or pump. If you find plain water difficult to drink during pregnancy due to nausea or taste changes, our Pumpin' Punch™ drink mix or Milky Melon™ drink mix beverages can help. These are formulated to provide hydration along with lactation-supporting ingredients that many parents find helpful.

Managing Nipple Sensitivity

Many pregnant parents experience significant nipple tenderness due to rising estrogen levels. This sensitivity can make nursing feel uncomfortable, which may cause you to nurse less frequently, further decreasing supply. To manage this:

Ensure your child has a deep, comfortable latch.
Use a high-quality nipple balm after sessions.
Try different nursing positions to change where the pressure is applied.

Key Takeaway: While you cannot completely override pregnancy hormones, staying well-nourished and hydrated is the best way to support the milk production you currently have.

Preparing Your Body for the New Baby

If you are not currently nursing and are asking how to increase supply for the baby you are carrying, your focus should be on preparation rather than trying to produce milk before the birth.

Understanding "The Surge"

Your mature milk will not "come in" until after your baby is born and the placenta is delivered. The delivery of the placenta causes your progesterone levels to drop sharply, which finally allows the hormone prolactin to take the lead. This hormonal shift is what triggers the transition from colostrum to a larger volume of milk.

Because this process is hormonal, you cannot "pre-build" a supply of mature milk while the placenta is still in your body. However, you can take actionable steps to make sure your supply establishes quickly and strongly once the baby arrives.

Antenatal Colostrum Harvesting

For many healthy pregnancies, healthcare providers may recommend "colostrum harvesting" or hand expression starting around 36 or 37 weeks. This involves using your hands to gently express small drops of colostrum into a sterile syringe.

This practice is beneficial because:

It helps you learn the anatomy of your breasts and how your milk flows.
It provides a "freezer stash" of colostrum in case your baby needs a supplement after birth.
It can help stimulate the mammary tissue in preparation for birth.

Important Note: Always consult your doctor or midwife before starting any form of hand expression or nipple stimulation during pregnancy. In some cases, this can trigger uterine contractions, so it is important to ensure you are at a safe stage of pregnancy to begin.

Sizing Your Breast Pump

If you plan to use a pump, pregnancy is the perfect time to ensure you have the right tools. Most parents use a flange (the plastic cone that fits over the nipple) that is too large. An ill-fitting flange can lead to nipple damage and a lower milk supply because it doesn't stimulate the tissue effectively.

While your nipple size may change slightly after birth, you can get a measurement during your third trimester to have a baseline. Having several flange sizes on hand before you come home from the hospital can save you a lot of stress in the first week.

For additional guidance, visit the Breastfeeding Resource Center, which includes information about pumping and flange sizing.

Nutrition to Support Your Future Supply

While you can't "force" more milk while pregnant, the nutrients you consume now provide the building blocks for your body’s recovery and lactation success later.

Whole Grains and Iron

Oats are perhaps the most famous food for supporting lactation. They are rich in iron and saponins, which are plant-based compounds that can support the hormones involved in milk production. Low iron levels are a common reason for a delayed "milk coming in" phase, so focusing on iron-rich grains now is a smart move.

Incorporating oatmeal into your breakfast or enjoying oat-based snacks can help. Our Emergency Brownies are one of our most-loved treats because they combine oats, brewer's yeast, and flaxseed into a delicious snack. Many parents find that keeping these in their hospital bag gives them a nutritional boost immediately after delivery.

Healthy Fats and Flaxseed

Flaxseed is a fantastic source of omega-3 fatty acids and phytoestrogens. These nutrients are essential for your own tissue repair and help support the quality of your early milk. Since your body is undergoing massive structural changes to the mammary tissue during the third trimester, providing these healthy fats is vital.

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

Brewer's Yeast

Brewer's yeast is a traditional nutritional supplement used for centuries to support supply. It is packed with B vitamins, protein, and minerals like chromium and selenium. Adding a tablespoon to your morning yogurt or including it in your baking can help support your overall energy levels as your body prepares for the metabolic demands of breastfeeding.

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

Setting the Stage for Postpartum Success

The best way to "increase" your potential supply while pregnant is to create a postpartum environment where supply can thrive. Milk production is a cycle of removal and replenishment.

Skin-to-Skin Contact

Plan to spend as much time as possible "skin-to-skin" with your newborn. This practice, often called Kangaroo Care, triggers a massive release of oxytocin in your body. Oxytocin is known as the "love hormone," and it is directly responsible for the let-down reflex (the process of milk moving through the ducts).

The more oxytocin you have flowing, the more efficiently your body will respond to your baby's hunger cues. Creating a "nursing nest" at home where you can rest and bond without distractions is one of the best preparations you can make.

Education and Support

Breastfeeding is a natural process, but it doesn't always come naturally. It is a learned skill for both you and your baby. Taking a breastfeeding class or talking to a certified lactation consultant during your pregnancy can reduce your stress levels significantly.

When you know what a "deep latch" looks like or how to identify your baby's "I'm hungry" cues, you are much less likely to worry about your supply. Stress produces adrenaline, which can actually block oxytocin and make it harder for your milk to flow. Consider exploring online breastfeeding courses before your baby arrives.

Create a "What to Do Next" Preparation List:

Weeks 20-30: Focus on high-protein, iron-rich nutrition and consistent hydration.
Weeks 30-36: Order your breast pump through insurance and learn how to assemble the parts.
Weeks 36+: Discuss colostrum harvesting with your provider and stock your pantry with nutritious snacks.
Post-Birth: Prioritize skin-to-skin contact and nurse on demand (at least 8-12 times in 24 hours).

Managing Realistic Expectations

It is important to remember that every body is different. Some parents find they can nurse throughout their entire pregnancy with a steady, though small, supply of colostrum. Others find their supply dries up almost completely by the second trimester. Neither of these situations is a "failure"—they are simply reflections of how your individual hormones are reacting to the pregnancy.

If you are nursing a toddler and your supply drops, it is okay to supplement with age-appropriate solids or other milks as recommended by your pediatrician. If you are preparing for your first baby, do not worry if you don't feel "full" or leak milk during pregnancy. Leaking is not an indicator of how much milk you will have after birth.

Your body was literally created to feed human babies, and it is doing an incredible job right now growing a new life. Be kind to yourself during this transition.

Key Takeaway: The "demand" signal of breastfeeding is most effective after the birth of the baby. Preparation during pregnancy is about nutrition, education, and gathering the right tools for support.

Conclusion

Understanding how to increase your milk supply while pregnant starts with accepting the biological changes your body is navigating. While rising progesterone levels may naturally limit your current volume, focusing on hydration, a calorie-dense diet, and specific nutrients like oats and flaxseed can help support your wellness. We are dedicated to providing the products and expertise you need to feel confident in your journey, whether you are tandem nursing or preparing for your very first latch.

Hormonal shifts are the primary reason for supply changes during pregnancy.
Nutrition and hydration are the best ways to support the supply you have.
Antenatal preparation helps establish a strong supply after birth.
Support and education are just as important as physical prep.

Every drop counts, and you are doing an amazing job. If you find yourself needing more personalized guidance, we offer virtual lactation consultations to help you navigate your specific challenges. We are here to support you every step of the way.

FAQ

Can I use a breast pump while pregnant to boost my supply for later?

Generally, we do not recommend using a breast pump during pregnancy to "increase" supply. Nipple stimulation can release oxytocin, which may cause uterine contractions and potentially lead to preterm labor. It is best to wait until your baby is born to use a pump, or speak with your doctor about hand expression in the final weeks of pregnancy.

Why did my milk supply drop so early in my pregnancy?

A drop in milk supply can happen as early as the first few weeks of pregnancy due to a sharp rise in progesterone. This hormone inhibits the production of mature milk as your body begins to shift its energy toward growing the new baby and producing nutrient-dense colostrum.

Is it safe to take lactation supplements while I am pregnant?

While many ingredients in lactation supplements, like oats and brewer's yeast, are safe and nutritious during pregnancy, you should always consult your healthcare provider before starting any new herbal supplement. Some herbs can have effects on the uterus, so professional guidance is essential to ensure the safety of your pregnancy. You can browse the lactation supplements collection after discussing your options with your provider.

Will my older child use up all the colostrum before the new baby is born?

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How Can I Increase My Milk Supply While Pregnant?

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