Does Breast Milk Supply Decrease When Pregnant? What to Expect
Posted on April 18, 2026
Table of Contents
- Introduction
- Why Milk Supply Changes During Pregnancy
- When Does the Supply Drop Usually Happen?
- The Physical Sensation of Nursing While Pregnant
- How Your Milk Changes in Quality
- Supporting Your Body and Supply
- Can Lactation Supplements Help?
- The Safety of Nursing While Pregnant
- When the Nursing Child is Under One Year Old
- Dealing with Nursing Aversion and Agitation
- Will the Milk Ever Come Back?
- Practical Steps to Take Today
- Making the Decision to Wean
- Conclusion
- FAQ
Introduction
Finding out you are pregnant while still nursing your little one can bring up a mix of emotions. You might feel excited about your growing family, but you may also feel a bit worried about your current breastfeeding journey. Many moms wonder if they can continue to nurse through their pregnancy and what will happen to their milk supply as their body changes. It is a common question with a very real physical answer that affects your daily routine.
At Milky Mama, we understand that navigating pregnancy while breastfeeding requires extra support and clear information. If you need personalized guidance, our breastfeeding help page can help you take the next step. This transition involves significant hormonal shifts that naturally impact how much milk your body produces. This post will cover why milk supply often decreases during pregnancy, when you can expect to see changes, and how you can support your body through this dual demand. We are here to help you feel empowered as you manage the needs of your nursing child and your developing baby.
The short answer is that for most people, milk supply does indeed decrease during pregnancy due to shifting hormone levels.
Why Milk Supply Changes During Pregnancy
The primary reason milk supply decreases during pregnancy is hormonal. As soon as a new pregnancy begins, your body starts producing high levels of estrogen and progesterone. These hormones are essential for maintaining a healthy pregnancy and helping your new baby grow. However, they also have a direct impact on the hormones responsible for milk production.
Progesterone, in particular, acts as an inhibitor to prolactin. Prolactin is the hormone that tells your breasts to make milk. During a typical breastfeeding journey, your prolactin levels stay high enough to keep your supply steady. When you become pregnant, the rising progesterone levels interfere with this signal. This is a natural protective mechanism for the body. It ensures that your physical resources are prioritized for the developing fetus. If you want a fuller overview, read our How to Support Your Milk Supply While Pregnant guide.
Even if you are nursing frequently or pumping often, these hormonal signals are very powerful. Unlike a typical supply drop caused by skipping a feed, a pregnancy-related drop is driven by your internal chemistry. This means that "supply and demand" works a little differently during these nine months. You may find that your body does not respond to extra stimulation in the same way it did before you were pregnant.
Key Takeaway: Pregnancy hormones like progesterone naturally suppress milk production to prioritize the growth of the new baby.
When Does the Supply Drop Usually Happen?
Every person and every pregnancy is unique. However, most nursing mothers notice a significant decrease in their milk supply during the first or second trimester. For many, the change becomes obvious between the fourth and fifth months of pregnancy. This is the period when the hormonal shifts are most dramatic as the placenta takes over hormone production.
In the first trimester, you might notice a slight dip. This can be hard to distinguish from the normal fluctuations caused by fatigue or morning sickness. By the middle of the second trimester, the drop is usually more pronounced. This is also when your milk begins to transition back into colostrum. Colostrum is the thick, nutrient-dense "liquid gold" that your body produces for a newborn. It is very different from the mature milk your older baby or toddler is used to drinking.
Common Signs Your Supply is Decreasing
- Your baby seems frustrated or pull at the breast during feeds.
- You notice your child is asking to nurse more frequently to get the same amount of milk.
- Pumping sessions result in significantly less milk than they used to.
- Your breasts feel "empty" or softer much sooner than usual.
- Your child begins to show interest in more solid foods or other fluids.
The Physical Sensation of Nursing While Pregnant
It isn't just the amount of milk that changes. Your physical experience of nursing will likely change too. One of the earliest signs of pregnancy for many nursing moms is nipple sensitivity. This is not the same as a poor latch or a temporary soreness. It is a hormonal sensitivity that can make nursing feel quite uncomfortable.
For some, this sensitivity can lead to something called "nursing aversion." This is a strong physical or emotional feeling of wanting the child to stop nursing immediately. It is a very common experience, but it can cause a lot of guilt for mothers. If you feel this way, please know you are not alone. It is a biological response to the high levels of hormones in your system.
Tips for Managing Nipple Soreness
- Ensure your child has the best latch possible to minimize friction.
- Try shorter nursing sessions instead of long comfort-nursing periods.
- Use a high-quality nipple balm or even a little expressed milk to soothe the skin.
- Practice deep breathing or "grounding" techniques if you experience nursing aversion.
How Your Milk Changes in Quality
The decrease in quantity is often accompanied by a change in quality. As your body prepares for the new arrival, the composition of your milk shifts. As mentioned earlier, your mature milk will eventually transition back to colostrum. This change usually happens during the second trimester.
Colostrum is higher in sodium and protein but lower in lactose (milk sugar) than mature milk. This means the milk will taste different—often more salty and less sweet. Some toddlers or older babies do not mind this change at all. Others may notice the difference and decide to wean on their own because they no longer like the taste.
Because colostrum also has a mild laxative effect, you might notice that your nursing child has slightly looser stools. This is normal and is simply a result of the high antibody and mineral content found in colostrum. Your body is essentially "re-setting" its milk production to be ready for the newborn's specific needs.
Supporting Your Body and Supply
While you cannot stop the hormonal shifts of pregnancy, you can support your body as it does the hard work of "double duty." Growing a baby and lactating at the same time is physically demanding. You need more calories, more water, and more rest than the average person.
Hydration is one of the most important factors. Pregnancy increases your blood volume, and breastfeeding requires fluid for milk. If you are dehydrated, your supply will likely drop even further. We recommend sipping on fluids throughout the day. Our lactation drink mixes are an easy way to keep hydration interesting while supporting lactation.
Nutrition is equally vital. You are eating for three people: yourself, your nursing child, and your developing baby. Focus on nutrient-dense foods like leafy greens, healthy fats, and lean proteins. If you are struggling to keep food down due to morning sickness, try small, frequent snacks.
Ways to Support Your Well-being
- Increase your daily water intake by at least 32 ounces.
- Prioritize protein-rich snacks like nuts, Greek yogurt, or eggs.
- Listen to your body and rest whenever your children are sleeping.
- Monitor your weight gain with your healthcare provider to ensure you are meeting caloric needs.
Can Lactation Supplements Help?
Many moms wonder if they can use supplements to bring their supply back up to pre-pregnancy levels. It is important to have realistic expectations. Because the drop is hormonal, even the strongest supplements may not fully restore your previous volume. However, they can help support the supply you do have and provide your body with helpful nutrients.
Our lactation supplements, such as Pumping Queen™ or Lady Leche™, are designed to support milk production using traditional ingredients. These can be a helpful addition to your routine if you are hoping to continue nursing through your pregnancy. Always remember that every body responds differently to herbs.
Next Steps for Support:
- Consult with your midwife or OB-GYN before starting any new herbal supplement during pregnancy.
- Focus on supplements that are free from harsh stimulants.
- Monitor your child's reactions to any changes in your routine.
This product is not intended to diagnose, treat, cure, or prevent any disease. Consult with your healthcare provider for medical advice.
The Safety of Nursing While Pregnant
A very common concern is whether nursing during pregnancy is safe for the developing baby. For the vast majority of healthy pregnancies, the answer is yes. Nursing causes a very small release of oxytocin, which is the hormone responsible for uterine contractions. However, in a healthy pregnancy, the uterus is not usually sensitive to these small amounts of oxytocin until very late in the third trimester.
If you have a history of preterm labor, are carrying multiples, or have been told to avoid sexual activity due to pregnancy complications, your doctor may advise you to wean. It is always best to discuss your breastfeeding plans with your healthcare provider. They can help you monitor your specific situation.
For most, tandem nursing (nursing two children of different ages) is a beautiful way to bond. If your child continues to nurse through the pregnancy, they will transition to sharing the milk with their new sibling once the baby arrives.
When the Nursing Child is Under One Year Old
The situation is a bit different if your nursing child is under 12 months old. At this age, breast milk or formula should still be their primary source of nutrition. If your supply drops significantly during pregnancy, your baby may not be getting the calories or nutrients they need from nursing alone.
In these cases, you must monitor your baby’s weight gain and wet diaper count very closely. If you notice a decrease in wet diapers or if your baby is not gaining weight according to their curve, you may need to supplement. For more guidance on recognizing real supply problems, our what to do when milk supply is low guide can help. This can be done with expressed milk from your freezer stash, donor milk, or formula.
If your child is over a year old, they are likely getting most of their nutrition from solid foods. For them, nursing is often more about comfort and immune support. If your supply drops, it may not be a nutritional emergency, but it might still be an emotional transition for both of you.
Monitoring Your Child's Health
- Track wet diapers; they should have at least 5-6 heavy wet diapers in 24 hours.
- Watch for signs of dehydration, such as lethargy or a dry mouth.
- Stay in close contact with your pediatrician about your pregnancy.
- Be prepared to offer extra solid foods or water if the child is over six months old.
Dealing with Nursing Aversion and Agitation
Nursing aversion is one of the least talked about but most difficult parts of breastfeeding while pregnant. It often feels like an intense skin-crawling sensation or a sudden flash of anger when the child latches. This is not a reflection of your love for your child. It is a biological signal that your body is feeling "touched out" or overstimulated.
If you experience this, it is okay to set boundaries. Breastfeeding is a relationship, and both people’s needs matter. You can try "distraction nursing," where you read a book or watch a show together while they nurse. You can also implement "time-limited" feeds. Using a timer or a short song to signal the end of a nursing session can help you manage the physical discomfort while still providing that connection for your child.
Takeaway: Your mental and physical well-being are just as important as the milk you produce. Setting boundaries is a healthy part of the nursing relationship.
Will the Milk Ever Come Back?
The "drop" is not permanent. Once you give birth to your new baby and the placenta is delivered, your progesterone levels will plummet. This signal tells your body to start producing milk in large quantities again. Your milk will transition from colostrum back to mature milk within a few days of birth.
If you have continued to nurse your older child, you may find that your supply becomes very robust. This is one of the benefits of tandem nursing. The older child can help "regulate" your supply and can even help relieve engorgement in those early days after birth. Your body is incredible and will adjust to feed both children if that is what you choose to do.
At Milky Mama, we love seeing families thrive through these transitions. Whether you choose to nurse through your whole pregnancy or decide that weaning is the best path for you, we support your decision. You are doing the work of two people right now, and that is worth celebrating.
Practical Steps to Take Today
If you have just noticed your supply dipping, don't panic. There are practical steps you can take to make the transition easier for everyone involved. If you want more structured education, our Breastfeeding 101 course can be a helpful next step.
- Evaluate the "Why": Confirm that the drop is likely due to pregnancy and not another factor like illness or stress.
- Increase Self-Care: Add one extra glass of water and one extra protein snack to your day.
- Talk to Your Child: If they are old enough to understand, explain that "mommy's milk is changing" or "the milk is for the new baby soon."
- Prepare for Supplementing: If your baby is under one, have a plan in place with your pediatrician in case you need to offer extra ounces.
- Check Your Gear: If you are pumping, ensure your flanges still fit correctly, as pregnancy can change your breast shape and size.
Making the Decision to Wean
For some mothers, the combination of decreased supply, nipple pain, and exhaustion makes weaning the right choice. This is a personal decision and there is no "right" way to feed your child. If nursing is no longer working for you or your family, it is okay to begin the weaning process.
Weaning during pregnancy can be done gradually. You might start by dropping the nursing session that feels the most uncomfortable. You can replace that time with extra cuddles, a new snack, or a fun activity. If you want a softer transition, our Gentle Weaning: Your Guide to Stopping Pumping guide is a helpful read. This helps your older child still feel connected to you even as the nursing relationship changes.
Remember, the goal is a healthy mom and a healthy baby. If weaning allows you to be a more present and comfortable mother, then it is a positive step. Your journey is unique, and you deserve to enjoy this pregnancy.
Conclusion
A decrease in milk supply during pregnancy is a very common and natural occurrence. Driven by the powerful hormones needed to support your new baby, your body shifts its focus toward the womb. While this can be a challenging transition, understanding the "why" can help you manage the "how." By focusing on hydration, nutrition, and listening to your body's signals, you can navigate this season with confidence.
- Milk supply usually drops mid-pregnancy due to high progesterone levels.
- Nipple sensitivity and nursing aversion are common but manageable hormonal symptoms.
- Hydration and nutrition are your best tools for supporting the supply you have.
- Tandem nursing is generally safe for most healthy pregnancies.
You are doing an amazing job balancing the needs of your family. If you need extra support during this time, we are here for you. Consider trying some of our lactation treats, like our Emergency Brownies, to give yourself a delicious boost of support and a well-deserved treat during your busy day.
FAQ
Can I increase my milk supply while pregnant?
It is difficult to significantly increase supply during pregnancy because the drop is caused by hormones rather than a lack of demand. While supplements and hydration can support your current production, they usually cannot override the body's natural shift toward colostrum. Focus on maintaining your health and supporting what your body is currently able to produce.
Is it safe to continue breastfeeding while I am pregnant?
For most women with a low-risk pregnancy, it is completely safe to continue breastfeeding. While nursing causes a small release of oxytocin, it is usually not enough to trigger labor in a healthy uterus. Always consult with your healthcare provider if you have a history of preterm labor or other pregnancy complications.
When does milk turn into colostrum during pregnancy?
The transition from mature milk to colostrum usually happens during the second trimester, often between weeks 16 and 22. You might notice the milk becomes thicker, more yellow, and tastes less sweet. This change is your body's way of preparing to provide the perfect first food for your newborn.
Will my toddler wean themselves because of the supply drop?
Many toddlers do choose to wean during their mother's pregnancy because the milk volume decreases or the taste changes. Some children don't mind the change and will continue to nurse for comfort. Whether your child weans or continues to nurse is often a combination of their personality and the physical changes in your milk.
Bestsellers
Emergency Lactation Brownies
Regular price
From $61.00 NZD
Regular price
Sale price
From $61.00 NZD
Unit price
per
$54.90 NZD
Subscribe & Save: 10% off
SHOP NOW
Lady Leche
Regular price
$47.00 NZD
Regular price
Sale price
$47.00 NZD
Unit price
per
$42.30 NZD
Subscribe & Save: 10% off
SHOP NOW
Bestseller Bundle
Regular price
$149.00 NZD
Regular price
Sale price
$149.00 NZD
Unit price
per
$134.10 NZD
Subscribe & Save: 10% off
SHOP NOW
Pump Hero
Regular price
$38.00 NZD
Regular price
Sale price
$38.00 NZD
Unit price
per
$34.20 NZD
Subscribe & Save: 10% off
SHOP NOW
