Does Your Milk Supply Drop If You Get Pregnant? What To Expect

Posted on April 13, 2026

Introduction
How Pregnancy Affects Your Milk Supply
Recognizing the Signs of a Pregnancy-Related Milk Drop
Can You Increase Milk Supply While Pregnant?
Navigating the Challenges of Nursing While Pregnant
Safety and Lactation Support During Pregnancy
To Wean or Not to Wean: Making the Choice for Your Family
Conclusion
FAQ

Introduction

Finding out you are pregnant while still breastfeeding can bring up a whirlwind of emotions. You might feel excited about your growing family but also a bit anxious about how this change will affect your current nursing journey. One of the most common questions we hear is: does your milk supply drop if you get pregnant? The short answer is yes, for many parents, a decrease in milk volume is one of the earliest signs of a new pregnancy.

At Milky Mama, we believe that education is the best tool for navigating these transitions with confidence. Understanding why these changes happen can help you make the best decisions for your health and your children. In this article, we will explore the hormonal shifts that cause a supply drop, when you can expect these changes to occur, and how to manage feeding your little one while expecting another. You’re doing an amazing job, and we are here to support you every step of the way.

How Pregnancy Affects Your Milk Supply

When you become pregnant, your body undergoes a massive internal shift to prioritize the growth of a new life. These changes are primarily driven by hormones, which act as chemical messengers. While breastfeeding is a process of supply and demand, pregnancy introduces a "hormonal override" that changes the rules for a while.

The Role of Hormones

The main reason for a drop in milk supply during pregnancy is the rise in estrogen and progesterone. During a typical breastfeeding journey, your body produces high levels of prolactin, the hormone responsible for making milk. However, once a new pregnancy begins, the placenta produces significant amounts of progesterone.

High levels of progesterone actually inhibit milk production. This is the same reason why your milk doesn't fully "come in" until a few days after birth—the drop in progesterone after the placenta is delivered is what signals your body to start full-scale milk production (a process called lactogenesis II). When you get pregnant while nursing, that progesterone starts to climb again, often causing the volume of milk to taper off.

When Does the Supply Drop Happen?

Every body responds to pregnancy differently, but most nursing parents notice a significant change between the first and second trimesters. Specifically, many experience a dip around the 10th to 16th week of pregnancy. For some, the drop is one of the very first signs they are pregnant, occurring even before a missed period.

For others, the supply may remain stable for the first few months and then decrease sharply as they approach the halfway point of the pregnancy. It is important to remember that this decrease is physiological. It is not a sign that you are doing anything wrong or that your body is failing. Breasts were literally created to feed human babies, and right now, your body is simply trying to balance the needs of two different stages of development.

Key Takeaway: Milk supply drops during pregnancy because rising progesterone levels naturally suppress milk production to prioritize the new pregnancy.

Recognizing the Signs of a Pregnancy-Related Milk Drop

If you aren't tracking your supply with a pump, you might not notice a drop immediately. However, there are several physical and behavioral cues that can alert you to a change in your milk volume or composition.

Changes in Milk Composition

Around the middle of your pregnancy, your milk doesn't just decrease in volume; it also changes in "recipe." Your body begins to transition from mature breast milk back to colostrum. Colostrum is the thick, concentrated "liquid gold" that newborns need in the first days of life. It is high in protein and antibodies but lower in sugar (lactose) than mature milk.

Because colostrum is produced in much smaller quantities than mature milk, your breasts may feel softer and less full than they used to. You may also notice that the color of your milk becomes more yellow or golden. This transition is a brilliant way for your body to prepare for the new baby's arrival, ensuring they have exactly what they need the moment they are born.

Baby or Toddler Reactions

If you are nursing a baby who relies heavily on breast milk for nutrition, they may become fussier at the breast. They might pull at the nipple, cry during sessions, or want to nurse much more frequently to try to "order" more milk. This is often referred to as a nursing strike or increased demand.

Toddlers, on the other hand, often react to the change in taste. Because colostrum is higher in sodium and lower in sugar, it tastes saltier than mature milk. Some toddlers will naturally start to wean themselves because they don't like the new flavor or the slower flow. Others won't mind at all and will continue to nurse for comfort regardless of how much milk they are getting.

Can You Increase Milk Supply While Pregnant?

This is perhaps the most challenging part of nursing while pregnant. Under normal circumstances, we recommend frequent nursing and pumping to boost supply. This relies on the "supply and demand" feedback loop. However, pregnancy-related supply drops are hormonal, not demand-based.

For additional perspective on supporting supply during this transition, read Milky Mama’s guide to breastfeeding through pregnancy.

Why Traditional Methods May Differ

Because the drop is caused by high progesterone levels from the placenta, "power pumping" or nursing more often may not have the same effect it usually does. Your body is receiving a very strong internal signal to slow down milk production, and that often overrides the external signal of milk removal.

For many moms, no matter how much they pump or how many lactation cookies they eat, the supply stays low until the new baby is born. This can be frustrating, but it’s a time to give yourself grace. You are already doing the incredible work of growing a human being.

Focusing on Nutrition and Hydration

While you might not be able to "force" a high volume of milk during pregnancy, you can support your body so it has the resources it needs. Nursing while pregnant requires a significant amount of energy. You are essentially "eating for three"—yourself, your nursing child, and the developing fetus.

Caloric Intake: You may need an additional 500 to 800 calories per day to support both pregnancy and lactation.
Hydration: Staying hydrated is essential. Our Pumpin Punch™ or Milky Melon™ can be a refreshing way to keep your fluids up while providing extra vitamins.
Mineral Support: Some parents find that a calcium and magnesium supplement helps with the nipple sensitivity that often comes with pregnancy, though you should always check with your midwife or doctor first.

What to do next:

Monitor your child's weight and wet diapers if they are under one year old.
Increase your daily water intake and focus on nutrient-dense snacks.
Discuss your nursing goals with your healthcare provider.
Prepare for the possibility of supplementing if your baby is not yet on solid foods.

Navigating the Challenges of Nursing While Pregnant

Beyond the supply drop, nursing during pregnancy comes with its own set of physical and emotional hurdles. Being prepared for these can make the experience much more manageable.

Managing Nipple Sensitivity

One of the most common complaints among pregnant, nursing parents is extreme nipple tenderness. This is caused by the hormonal changes of pregnancy and can make nursing feel uncomfortable or even painful. For some, the sensation is similar to the sensitivity felt during the first few days of breastfeeding a newborn.

To manage this, you might try:

Using a nipple balm to keep the skin hydrated.
Checking your child's latch, as a shallow latch can exacerbate the pain.
Setting boundaries with older toddlers by shortening nursing sessions.
Using distraction or "counting" to let the child know when the session will end.

Emotional Shifts and Nursing Aversion

Some parents experience a phenomenon called "nursing aversion" or "nursing agitation" during pregnancy. This is an intense feeling of irritability or the urge to "get the baby off" as soon as they latch. It is a biological response that some believe is the body’s way of protecting its resources for the new pregnancy.

If you feel this way, please know that you are not a bad parent. It is a very real, physiological response. Taking deep breaths, staying hydrated, and ensuring you are getting enough rest can help, but it is also okay to decide that weaning is the best choice for your mental health. Every drop counts, but your well-being matters too.

Safety and Lactation Support During Pregnancy

A common myth is that breastfeeding while pregnant causes miscarriage or preterm labor. For a healthy, low-risk pregnancy, breastfeeding is generally considered safe. While nipple stimulation can cause mild uterine contractions (due to the release of oxytocin), these are usually not strong enough to trigger labor in a healthy pregnancy.

However, if you have a history of preterm labor, are carrying multiples, or have been advised to practice "pelvic rest," your doctor may suggest weaning. Always keep an open line of communication with your healthcare provider.

Regarding supplements, many parents wonder if they can continue taking lactation aids. Most herbal supplements should be reviewed by your OB-GYN or midwife before use during pregnancy. While ingredients like oats and flaxseeds found in our Emergency Brownies are generally considered safe foods, concentrated herbal blends like Lady Leche™ or Pumping Queen™ should be discussed with a professional to ensure they align with your specific pregnancy health needs.

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

To Wean or Not to Wean: Making the Choice for Your Family

As your supply drops and your body changes, you will have to decide whether to continue nursing (which may lead to tandem nursing once the baby arrives) or to wean your older child.

Consider continuing if:

You enjoy the bonding time and the child is still finding comfort in it.
You want to tandem nurse (nursing both the newborn and the older child).
Your older child is not ready to stop, and you can manage the physical discomfort.

Consider weaning if:

Nursing is causing you significant pain or emotional distress.
Your child is over a year old and has naturally lost interest due to the taste or supply change.
Your healthcare provider has advised it for medical reasons.
You feel touched out and want to focus your energy on the new pregnancy.

There is no "right" way to handle this. Whether you nurse through the entire pregnancy or choose to stop now, you are making the best choice for your family’s unique situation. Fun fact: breastfeeding in public — covered or uncovered — is legal in all 50 states, so whether you are nursing one or two, you have the right to do so wherever you feel comfortable.

Conclusion

The journey of breastfeeding while pregnant is a unique and often challenging path. While a drop in milk supply is a very common side effect of pregnancy hormones, it doesn't have to mean the end of your nursing relationship if you aren't ready for it to be. By understanding the shift toward colostrum, managing nipple sensitivity, and prioritizing your own nutrition, you can navigate these months with grace.

Expect a supply drop between weeks 10 and 16.
Prioritize rest and extra calories to support yourself and both children.
Listen to your body regarding nursing aversion or physical pain.

At Milky Mama, we are here to support you through every stage of motherhood. If you need more personalized guidance, our virtual lactation consultations can help you create a plan that works for you. Remember, you're doing an amazing job, and your body is doing incredible things.

FAQ

Will my milk supply come back during pregnancy if I pump more?

Generally, a pregnancy-related supply drop is driven by hormones rather than demand, so extra pumping may not significantly increase your volume. While you can maintain the "habit" of nursing, the actual milk amount usually stays low until after the new baby is born and the placenta is delivered.

Is it safe to nurse while pregnant?

For most people with a low-risk pregnancy, nursing is perfectly safe and does not increase the risk of miscarriage or preterm labor. However, if you have specific medical concerns or a history of pregnancy complications, you should consult your doctor or midwife.

Why does my toddler say my milk tastes "funny" now that I'm pregnant?

As your body prepares for the new baby, your milk transitions back into colostrum, which has a different nutritional profile. Colostrum is higher in sodium and lower in sugar than mature milk, which gives it a saltier taste that some older children might notice.

When will my "real" milk return after the baby is born?

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Does Your Milk Supply Drop If You Get Pregnant? What To Expect

Table of Contents

Introduction