How Soon After Getting Pregnant Does Your Milk Supply Drop?

Posted on April 09, 2026

When Does Milk Supply Drop During Pregnancy?

Introduction
The Hormonal Shift: Why Milk Supply Changes
The Timeline: How Soon Does the Drop Happen?
Recognizing the Signs of a Supply Drop
Is It Safe to Nurse While Pregnant?
Supporting Your Body and Your Supply
The Reality of Tandem Nursing
When Your Child Weans Themselves
Distinguishing Pregnancy Drops from Other Factors
Conclusion
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 to your family, but you may also feel a sense of worry about your current nursing journey. One of the most common questions we hear from parents in this situation is how soon after getting pregnant does your milk supply drop. It is a valid concern, as the body undergoes massive hormonal shifts to support a new pregnancy, and these changes often impact lactation.

At Milky Mama, we believe that knowledge is power. Whether you plan to continue nursing through your pregnancy or are considering weaning, understanding what is happening in your body can help you make the best choice for your family. For personalized guidance, our breastfeeding help page can connect you with support as you navigate this new chapter. In this post, we will explore the hormonal science behind pregnancy-induced supply drops, the typical timeline you can expect, and how to manage the changes in your milk. We will also discuss the safety of tandem nursing and how to support your body during this transition. Every breastfeeding journey is unique, and our goal is to provide the clinical expertise and emotional support you need to navigate this new chapter.

The Hormonal Shift: Why Milk Supply Changes

To understand why your milk supply might dip, we have to look at the "big players" in your endocrine system. Breastfeeding is primarily driven by a hormone called prolactin. Prolactin is responsible for the actual production of milk in the mammary glands. When you are nursing or pumping, your body receives signals to keep prolactin levels high so that you can continue making milk.

However, once you become pregnant, a different hormone takes center stage: progesterone. Progesterone is often called the "pregnancy hormone" because it is essential for maintaining the uterine lining and supporting the developing fetus. While progesterone is vital for your new baby, it is naturally anti-lactogenic. This means it actively works to suppress the effects of prolactin.

The Role of the Placenta

During the first few weeks of pregnancy, the corpus luteum (a temporary structure in the ovary) produces progesterone. As the pregnancy progresses into the second trimester, the placenta takes over this job. The rising levels of progesterone send a clear message to your breasts to begin transitioning. Instead of focusing on high-volume mature milk, the body begins to prepare for the new arrival by shifting back toward colostrum. This hormonal override is the primary reason why supply often drops regardless of how often you nurse or pump.

Prolactin vs. Progesterone

Think of it as a tug-of-war. During a standard breastfeeding journey, prolactin is winning. Once pregnancy occurs, progesterone begins to pull harder. For most people, the "demand" part of supply and demand becomes less effective because the hormonal "supply" signal is being muffled. It is important to remember that this is a normal, healthy biological process, though it can certainly be frustrating if you aren't ready to stop nursing.

Key Takeaway: Milk supply drops during pregnancy because rising progesterone levels interfere with the milk-making hormone, prolactin. This is a hormonal shift that usually cannot be fully reversed by increased pumping or nursing.

The Timeline: How Soon Does the Drop Happen?

Every person’s body responds to pregnancy hormones differently. Some parents notice a change almost immediately, while others maintain a steady supply for several months. However, there are general patterns that many breastfeeding moms experience.

The First Few Weeks (Weeks 1-8)

During the very early stages of pregnancy, you might not notice a significant change in the volume of your milk. You may, however, notice other symptoms that impact your breastfeeding experience. Nipple sensitivity is often one of the first signs of pregnancy. This can make nursing feel uncomfortable or even painful, leading some parents to nurse less frequently. If nursing sessions become shorter or less frequent due to discomfort, you might see a slight dip in supply early on.

The Turning Point (Weeks 10-16)

For the majority of nursing parents, the most noticeable drop in milk supply occurs toward the end of the first trimester and the beginning of the second trimester. This usually happens between weeks 10 and 16. During this window, progesterone levels are climbing significantly. If you want a deeper look at that pattern, this guide on breastfeeding through pregnancy walks through the same transition in more detail.

Many moms report that their pump output decreases by half or more during this time. You might notice your baby becoming frustrated at the breast or wanting to nurse more frequently to compensate for the slower flow. This is also when the composition of the milk begins to change, becoming thicker and saltier as it transitions back toward colostrum.

The Second and Third Trimesters

By the middle of the second trimester, many parents find that their milk has significantly diminished or disappeared entirely. This is sometimes referred to as "dry nursing" if the child continues to suckle for comfort even though no milk is being produced. While some milk may remain, it is typically very low in volume until after the birth of the new baby, when the delivery of the placenta causes progesterone to plumet and prolactin to take over once again.

Summary of the Pregnancy Supply Timeline

Weeks 1–4: Supply is usually stable, but nipple sensitivity may begin.
Weeks 5–9: A slight decrease may occur; milk may start to change in taste.
Weeks 10–16: The most common period for a significant drop in volume.
Week 20 and beyond: Supply is often very low; milk has likely transitioned to colostrum.

Recognizing the Signs of a Supply Drop

If you aren't sure if your supply is dropping or if your baby is just going through a phase, there are several signs to look for. Because your body is going through so many changes, it can be helpful to track these signs over a week or two.

Changes in Pump Output

If you pump regularly, the most obvious sign will be the amount of milk in the bottle. You might see a steady decline over several weeks. It is important to check your pump parts first to ensure the drop isn't due to a worn-out valve or membrane. If the parts are new and the output is still low, it is likely the pregnancy.

Baby’s Behavior at the Breast

Your nursing child may be the first to notice the change. They might:

Pull at the breast or act frustrated.
Nurse for much longer sessions than usual.
Ask to nurse more frequently.
Suddenly lose interest in nursing because the taste has changed or the "work" required to get milk has increased.

Changes in Milk Composition

Pregnancy milk is different from standard mature milk. As the volume drops, the concentration of sodium and protein increases, while lactose (milk sugar) decreases. This makes the milk taste less sweet and more savory. Some toddlers don't mind the change, while others may choose to wean on their own because they dislike the new flavor.

Physical Sensation

You may notice that your breasts feel "empty" or soft much more often. The feeling of a "let-down" (the tingling sensation when milk begins to flow) may become less intense or disappear entirely. Additionally, nursing aversion—a feeling of intense irritability or "skin-crawling" when the child latches—is a common hormonal side effect of nursing during pregnancy.

Is It Safe to Nurse While Pregnant?

A common myth is that breastfeeding while pregnant can cause a miscarriage or early labor. For the vast majority of healthy pregnancies, breastfeeding is perfectly safe. While nursing does cause mild uterine contractions due to the release of oxytocin, these are generally not strong enough to cause labor in a low-risk pregnancy.

When to Use Caution

There are certain circumstances where your healthcare provider might recommend weaning or reducing nursing sessions. These include:

A history of preterm labor.
Carrying multiples (twins, triplets, etc.).
Experiencing vaginal bleeding or uterine pain.
If you are having trouble gaining enough weight for the pregnancy.

Always consult with your OB-GYN or midwife to ensure that continuing to nurse is the right choice for your specific health profile. They can help you monitor your progress and ensure both the nursing child and the developing baby are getting what they need.

Supporting Your Body and Your Supply

While you may not be able to completely stop the hormonal drop in milk, you can certainly support your body through the process. Taking care of yourself is essential when your body is performing the double task of nourishing a child and growing a new one.

Prioritize Hydration and Nutrition

Lactation and pregnancy are both energy-intensive processes. You may need significantly more calories and fluids than you did before. Focus on nutrient-dense foods and stay on top of your water intake. We recommend our Pumpin Punch™ to help you stay hydrated while providing lactation-supportive ingredients. This can be a refreshing way to ensure you are getting the fluids your body craves.

Use Gentle Supplements

If you are looking to support the supply you have left, some herbal supplements may help. However, not all herbs are recommended during pregnancy. We often suggest products like Lady Leche™ or Pump Hero™ for general support, but you should always clear any new supplement with your healthcare provider while pregnant. Our supplements are crafted by a Registered Nurse and IBCLC to provide the highest quality support for nursing families.

Managing Nipple Soreness

Since pregnancy hormones make the skin more sensitive, you may need to adjust your nursing positions. Ensure your child has a deep latch, even if they are older. Using a high-quality nipple balm or even a few drops of expressed milk on the nipple can help soothe irritation between sessions.

Steps to Take Right Now:

Increase water intake: Aim for at least 80–100 ounces a day.
Monitor your child's growth: If they are under a year old, ensure they are still getting enough calories through supplemental milk if your supply drops.
Talk to your provider: Confirm your pregnancy is low-risk for continued nursing.
Check your pump: Replace any old parts to ensure you are removing milk as efficiently as possible.

Key Takeaway: You are doing an amazing job balancing the needs of two children. Focus on self-care and nutrition to help your body manage the extra demands of pregnancy and lactation.

The Reality of Tandem Nursing

If you choose to continue nursing through your pregnancy, you may end up "tandem nursing." This is when you nurse both your newborn and your older child. Many parents find this to be a beautiful way to help siblings bond and to ensure the older child continues to receive the immunological benefits of breast milk.

What to Expect with Tandem Nursing

When the new baby arrives, your milk will "come in" again in high volumes. Your body will naturally prioritize the newborn's needs, and you will produce enough milk for both children. In fact, having an older child who is an "expert" at nursing can sometimes help resolve engorgement issues more quickly.

However, tandem nursing requires a lot of energy and patience. It is okay to set boundaries with your older child. You might choose to only nurse them at certain times of the day to ensure you aren't feeling overwhelmed. If you want structured learning while you prepare, our online breastfeeding classes can be a helpful next step. Remember, your well-being matters just as much as the milk you provide.

When Your Child Weans Themselves

Sometimes, the drop in supply or the change in taste leads to "natural weaning." This happens when the child decides on their own that they are finished with their breastfeeding journey. While this can be emotional for the parent, it is a normal part of the process.

If your child is under one year old and your supply drops significantly, you will need to work with your pediatrician to introduce an appropriate breast milk substitute (like formula) to ensure they are meeting their nutritional needs. If the child is over a year old, they can usually transition to more solid foods and other liquids, but they will still benefit from the comfort and closeness of snuggling with you. For extra nourishment during that phase, some parents keep lactation snacks on hand.

Distinguishing Pregnancy Drops from Other Factors

Sometimes a drop in supply happens around the same time you find out you are pregnant, but it might actually be caused by something else. It is worth investigating these other factors to see if there is anything else you can do to boost your output.

Stress and Fatigue

Finding out you are pregnant while raising a young child is a lot to handle. High levels of stress can increase cortisol, which may interfere with your let-down reflex. Try to find small moments for rest and relaxation. Even five minutes of deep breathing can help lower stress levels.

Return of the Menstrual Cycle

If you haven't yet conceived but notice a drop, it could be your period returning. Many moms see a dip in supply during ovulation and in the days leading up to their period. This is usually temporary and rebounds once the period starts. If you are pregnant, this won't be the cause, but it is a common point of confusion for those in the "trying to conceive" phase. You can also read more about this pattern in maintaining milk supply when your period returns.

New Medications

Some medications used to treat pregnancy symptoms, like certain antihistamines for nausea or sleep, can have a drying effect on milk supply. Always tell your pharmacist and doctor that you are breastfeeding before starting a new medication.

This product is not intended to diagnose, treat, cure, or prevent any disease. Consult with your healthcare provider for medical advice. This is especially important when you are pregnant, as your nutritional and supplemental needs change.

Conclusion

Navigating a pregnancy while breastfeeding is a unique journey that requires grace, patience, and support. While the answer to how soon after getting pregnant does your milk supply drop is often "between 10 and 16 weeks," your experience may vary. The rise in progesterone is a powerful biological signal, but it doesn't have to mean the end of your nursing relationship unless you or your child are ready.

Whether you decide to tandem nurse or use this as a time to gently wean, know that you are providing wonderful care for both of your children. At Milky Mama, we are here to support you with educational resources and nourishing products every step of the way. You are doing an incredible job, and every drop of milk and every moment of connection counts.

Monitor the timeline: Watch for changes around the end of the first trimester.
Listen to your body: Pay attention to nipple sensitivity and nursing aversion.
Stay nourished: Keep your calorie and fluid intake high.
Consult professionals: Keep your midwife or OB-GYN in the loop.

"Breasts were literally created to feed human babies, and your body is simply shifting its resources to prepare for the next arrival. Trust the process and trust yourself."

Ready for more support? Explore our virtual lactation consultations for personalized guidance on nursing through pregnancy.

FAQ

Does milk supply always drop during pregnancy?

While a drop is extremely common due to the rise in progesterone, the extent of the drop varies from person to person. Some parents experience a total loss of milk by the second trimester, while others are able to maintain a small supply throughout the entire pregnancy.

Can I use lactation cookies to bring my milk back during pregnancy?

Lactation treats, like our Emergency Brownies, are excellent for supporting supply through nutrition and galactagogues. However, they may not be able to fully overcome the hormonal suppressive effects of pregnancy. They are still a great way to ensure you are getting extra calories and support, but expectations should be managed.

Is the milk taste change permanent?

The taste of your milk changes as it transitions into colostrum during the second trimester. This change lasts until after you give birth and your mature milk "comes in" again, usually 3 to 5 days after delivery. Once the mature milk returns, it will regain its typical sweet flavor.

My toddler is frustrated with the lower supply. What can I do?

Subscribe & Save: 10% off

SHOP NOW

About Milky Mama

Support

Stay Connected