When Does Milk Supply Drop During Pregnancy? What to Expect

Posted on April 09, 2026

Navigating Your Milk Supply Drop During Pregnancy

Introduction
The Biological Connection Between Pregnancy and Lactation
When Does Milk Supply Drop During Pregnancy?
Why the Quality of Milk Changes
Signs Your Baby Is Noticing a Supply Drop
Managing Nipple Soreness and Nursing Aversion
Supporting Your Body During the Transition
Can You Increase Supply While Pregnant?
Preparing for Tandem Nursing
When to Seek Professional Support
Action Steps for Breastfeeding While Pregnant
Nutrition for the Pregnant, Nursing Parent
Understanding the "Dry" Period
Summary of the Journey
FAQ

Introduction

Finding out you are pregnant while you are still breastfeeding can bring up a whirlwind of emotions. You might feel excited about the new addition but also concerned about what this means for your current nursing journey. One of the most common questions we hear is "when does milk supply drop during pregnancy?" It is a valid concern because your body is now balancing the needs of a growing fetus with the demands of a nursing child.

At Milky Mama, we believe that education is the best way to feel empowered during these transitions. Understanding the hormonal changes happening in your body can help you navigate these shifts with confidence and grace. For additional guidance, read our guide to supporting milk supply during pregnancy.

The short answer is that most people experience a significant decrease in milk supply during the first or second trimester. This shift is primarily driven by hormones rather than a lack of stimulation or demand.

The Biological Connection Between Pregnancy and Lactation

To understand why your milk supply changes, we have to look at the powerful hormones at work. Breastfeeding is typically a "supply and demand" process. When your baby removes milk, your body makes more. However, pregnancy introduces a different set of rules.

During pregnancy, your body produces high levels of estrogen and progesterone. These hormones are essential for maintaining the pregnancy and helping the fetus grow. Unfortunately, they also act as a "brake" on milk production. Progesterone, in particular, is known to inhibit the production of milk.

Even if you continue to nurse frequently or use a breast pump, these hormonal signals often override the physical demand. Your body is biologically programmed to prioritize the pregnancy. This does not mean you have to stop nursing, but it does mean that the volume of milk you produce will likely decrease regardless of your efforts.

When Does Milk Supply Drop During Pregnancy?

Every person and every pregnancy is unique, but there is a general timeline that many breastfeeding parents notice. Most will see a change in their milk supply well before they reach the halfway point of their pregnancy.

The First Trimester

For some, the drop is one of the very first signs of pregnancy. You might notice your baby becoming a bit more fussy at the breast or wanting to nurse more frequently to compensate for a slower flow. By the end of the first trimester, many parents report a noticeable dip in volume.

During these early weeks, you might also experience nipple sensitivity. This can make nursing feel different or even uncomfortable. The combination of less milk and more sensitivity is often the first clue that the body is shifting its resources.

The Second Trimester

The most significant drop typically occurs between 16 and 24 weeks of pregnancy. This is the period when the hormonal shift is most intense. Studies and anecdotal evidence from lactation experts suggest that about 70% of breastfeeding parents will experience a drop in supply during this window.

At this stage, your milk also begins to change in composition. Your body starts to produce colostrum, which is the "liquid gold" meant for the new baby. Colostrum is highly concentrated and produced in smaller amounts than mature milk.

The Third Trimester

By the third trimester, your supply will likely consist entirely of colostrum. The volume will remain low until after the birth of your new baby. Once the placenta is delivered after birth, your progesterone levels will drop sharply, signaling your "milk to come in" again. This will eventually lead to a full supply for both your newborn and your older child if you choose to tandem nurse.

Why the Quality of Milk Changes

It is not just the quantity of milk that changes during pregnancy; the flavor and consistency change too. As your body transitions from mature milk back to colostrum, the levels of sodium and chloride increase. At the same time, the levels of lactose (milk sugar) decrease.

This shift often makes the milk taste saltier and less sweet. Some older babies or toddlers might notice this change and decide to wean on their own. Others do not seem to mind the flavor change at all and will continue to nurse for comfort even if they are getting very little milk.

Key Takeaway: A drop in milk supply during pregnancy is a normal, physiological response to rising hormone levels. It usually occurs significantly by the second trimester and involves a change in milk flavor.

Signs Your Baby Is Noticing a Supply Drop

If you are nursing a younger infant who relies on breast milk as their primary source of nutrition, it is important to watch for signs that they aren't getting enough. Toddlers who eat a variety of solid foods are usually less affected by the volume drop, but infants under one year old need close monitoring.

Look for these signs:

Fewer wet diapers (less than 5-6 per day).
Weight gain slowing down or stopping.
Increased fussiness during and after feedings.
Signs of dehydration, such as a dry mouth or lethargy.

If your baby is under six months old and your supply drops due to pregnancy, you must work closely with a pediatrician and a lactation consultant. You may need to supplement with expressed milk or formula to ensure your baby continues to grow and stay hydrated. Milky Mama's breastfeeding help and virtual lactation consultations can provide personalized support for feeding concerns.

Managing Nipple Soreness and Nursing Aversion

One of the biggest challenges of nursing while pregnant isn't just the milk supply; it is the physical discomfort. Increased estrogen can make your nipples extremely sensitive. Some parents also experience something called "nursing aversion."

Nursing aversion is a strong feeling of irritation, skin-crawling, or a desire to "get the baby off" while they are nursing. It is a hormonal response and is very common. If you experience this, know that you are not alone and it does not make you a bad parent.

To manage these feelings, try:

Using a distraction like a book or a show while nursing.
Deep breathing exercises during let-down.
Setting boundaries with older toddlers (e.g., "we will nurse until I count to ten").
Using cold compresses on your nipples after a session.

Supporting Your Body During the Transition

While you cannot stop the hormonal shift that causes the supply drop, you can support your overall health. Growing a baby and making milk at the same time is hard work for your body.

Prioritize Hydration

Staying hydrated is essential for your own energy levels and the health of your pregnancy. While drinking more water won't override pregnancy hormones to bring back a full supply, it ensures that your body has what it needs to produce colostrum. We recommend staying on top of your fluid intake throughout the day. Our Pumpin Punch™ drink mix is a great way to add flavor to your hydration routine while providing lactation-supportive ingredients.

Focus on Nutrition

You are essentially "eating for three" now—yourself, your nursing child, and the developing fetus. This is the time to focus on nutrient-dense foods. Make sure you are getting enough protein, healthy fats, and complex carbohydrates. For more ideas, explore this guide to eating for your breastfeeding journey.

Lactation treats can be a helpful addition to your diet. Our Emergency Brownies are a favorite among many of our customers because they provide a delicious way to get extra nutrients like oats and flaxseed. These ingredients are excellent for supporting your well-being during this demanding time.

Rest Whenever Possible

Fatigue is a major part of both pregnancy and breastfeeding. When you combine them, your energy stores can deplete quickly. High stress and exhaustion can sometimes make a supply drop feel even more drastic. Try to nap when your child naps and don't be afraid to ask for help with household chores.

Can You Increase Supply While Pregnant?

This is a tricky question. In a typical breastfeeding scenario, we would suggest power pumping or increasing nursing frequency. However, during pregnancy, these methods are often less effective because the hormones are the primary drivers of the drop.

You can try using gentle herbal support, but you must be careful. Some herbs are not recommended during pregnancy. Always consult with your OB-GYN or midwife before starting any new supplement. Products like our Dairy Duchess™ are formulated for lactation support, but you still need professional medical clearance to ensure they are right for your specific pregnancy.

For most people, the goal shifts from "increasing supply" to "maintaining comfort and connection." If your child is happy to nurse for comfort, and you are comfortable doing so, you can continue. If the supply drop makes nursing frustrating for either of you, it is okay to explore other ways of bonding.

Preparing for Tandem Nursing

If you plan to continue breastfeeding through your pregnancy, you may end up "tandem nursing." This means nursing both your newborn and your older child after the birth.

Many parents find that their supply returns in abundance once the new baby is born. The older child can actually be very helpful in those early days by helping to relieve engorgement. If you are interested in tandem nursing, it helps to start talking to your older child about "waiting for the milk to come back" and setting gentle expectations.

When to Seek Professional Support

Navigating a pregnancy while breastfeeding is a complex journey. You don't have to do it alone. If you are feeling overwhelmed, a lactation consultant can provide personalized guidance.

Reach out for help if:

Your infant is not gaining weight.
You are experiencing extreme pain while nursing.
You are struggling with intense nursing aversion or mood changes.
You are unsure if your baby needs supplementation.

At Milky Mama, we offer virtual lactation consultations to help you navigate these exact scenarios. A professional can look at your specific situation and help you create a plan that honors your body and your children's needs.

Action Steps for Breastfeeding While Pregnant

If you have just discovered you are pregnant, here is a quick checklist to help you manage your milk supply transition:

Track the changes: Note when your baby seems less satisfied or when your breasts feel softer.
Check in with your doctor: Confirm that nursing is safe for your specific pregnancy (it usually is, unless you are at risk for preterm labor).
Monitor your infant: If your nursling is under a year old, watch their weight and diaper output closely.
Boost your intake: Increase your water and calorie intake to account for the extra work your body is doing.
Be kind to yourself: Recognize that your body is doing something incredible. It is okay if things feel different now.

Key Takeaway: Focus on nutrition and hydration to support your body while it prioritizes your pregnancy. If you’re nursing an infant, monitor their growth closely during the second-trimester supply dip.

Nutrition for the Pregnant, Nursing Parent

Eating well is one of the best ways to handle the physical demands of this time. Since your milk supply is dropping due to hormones, you want to make sure the milk you do produce is as nutrient-dense as possible.

Include these in your daily routine:

Healthy Fats: Avocado, nuts, and olive oil support brain development for the fetus and provide energy for you.
Iron-Rich Foods: Spinach, lentils, and lean meats help prevent the anemia that can sometimes occur during pregnancy.
Calcium: You need extra calcium to support your own bone health while the fetus and your nursing child are both utilizing your stores.
Oats and Flax: These are gentle galactagogues (foods that support milk supply) that are generally safe and very nutritious.

Our lactation cookies and brownies are designed with these needs in mind. They provide a convenient way to get those beneficial ingredients while giving you a much-needed treat during a busy day.

Understanding the "Dry" Period

Some parents find that their milk supply disappears entirely for a few weeks or months during the late second or early third trimester. This is often referred to as "nursing dry."

If your child continues to nurse during this time, they are likely doing it for comfort, security, and the small amount of colostrum available. For toddlers, this is perfectly fine as long as they are getting their nutrition from solid foods and other liquids. For infants, this "dry" period necessitates supplementation.

It is important to remember that this "dry" period is temporary. Your body is simply preparing the perfect first food for your upcoming arrival. Your mature milk will return shortly after your new baby is born.

Summary of the Journey

The journey of breastfeeding through pregnancy is a testament to the amazing capabilities of the human body. While the drop in supply can be startling, it is a sign that your body is working exactly as it should to support your new pregnancy.

By understanding that the drop usually happens in the first or second trimester, you can prepare yourself mentally and physically. Whether you choose to continue nursing, tandem nurse, or use this time to gently wean, the choice is yours. There is no right or wrong way to navigate this transition as long as you and your children are healthy and supported.

Remember, every drop of milk and every moment of comfort you provide is valuable. You are doing an incredible job balancing the needs of your growing family.

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

FAQ

Does milk supply always drop during pregnancy?

While every body is different, the vast majority of breastfeeding parents (around 70%) will experience a significant drop in supply. This is due to the high levels of estrogen and progesterone required to maintain a healthy pregnancy. Even with frequent nursing, these hormonal changes usually lead to a decrease in volume by the second trimester.

Is it safe to continue breastfeeding while pregnant?

For most people with a healthy, low-risk pregnancy, breastfeeding is perfectly safe. The mild uterine contractions caused by oxytocin during nursing are generally not enough to trigger preterm labor in a healthy pregnancy. However, if you have a history of preterm labor or are carrying multiples, you should consult your healthcare provider.

Why does my baby suddenly dislike my milk now that I'm pregnant?

As your body transitions from mature milk to colostrum during the second trimester, the flavor of the milk changes. It becomes less sweet and more salty due to higher sodium levels. Some babies and toddlers are sensitive to this taste change and may nurse less or choose to wean on their own.

Can I get my milk supply back up to its original level while pregnant?

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When Does Milk Supply Drop During Pregnancy? What to Expect

Table of Contents

Introduction

The Biological Connection Between Pregnancy and Lactation