How to Increase Milk Supply in Third Trimester
Posted on February 09, 2026
Table of Contents
- Introduction
- Understanding the Science of Prenatal Milk Production
- Antenatal Hand Expression: The "How" of Pre-Birth Supply
- Optimizing Nutrition for Future Lactation
- Addressing Medical Factors and Potential Challenges
- Building Your Postpartum Support Village
- Selecting the Right Tools for Success
- The Role of the Birth Plan in Milk Supply
- Practical Steps Summary
- Why Your Well-Being Matters Most
- Conclusion
- FAQ
Introduction
As you approach the final weeks of your pregnancy, your mind is likely racing with a million different thoughts. You are picking out the perfect homecoming outfit, finishing the nursery, and perhaps feeling a little nervous about those first few feedings. Many expectant parents wonder if there is anything they can do right now to ensure a robust milk supply once the baby arrives. It is a common question, and the good news is that your body is already hard at work preparing for this journey.
At Milky Mama, we believe that education is the foundation of breastfeeding success. If you want a deeper starting point, our Breastfeeding 101 course is a helpful next step. While your mature milk will not "come in" until a few days after birth, the third trimester is a critical time to lay the groundwork. In this post, we will cover the science of pre-birth milk production, the safety of antenatal hand expression, and practical lifestyle shifts you can make today. Our goal is to help you feel empowered and ready before your little one even makes their debut.
The third trimester is less about seeing a high volume of milk and more about preparing your body and your environment for the physiological demands of lactation.
Understanding the Science of Prenatal Milk Production
Before we dive into how to increase milk supply in third trimester, we have to look at what is happening inside your body. You might have noticed your breasts changing shape or feeling heavier. You might even see a few leaks on your shirt. This is because your body begins the first stage of milk production, known as Lactogenesis I, around the midpoint of your pregnancy.
During this stage, your breasts begin to produce colostrum. Colostrum is often called "liquid gold" because it is a thick, concentrated first milk packed with antibodies and nutrients. It is the perfect first food for a newborn’s tiny stomach. Even though you are not yet "nursing," your mammary tissue is developing the capacity to feed your baby.
However, your body has a clever way of keeping the tap mostly closed for now. High levels of progesterone, a hormone that maintains your pregnancy, actually inhibit the full production of milk. It is not until the placenta is delivered that your progesterone levels drop, signaling your body to transition into Lactogenesis II, which is when your milk "comes in" more abundantly.
Key Takeaway: You are already making milk in your third trimester, but hormonal barriers keep the volume low until after the birth of your baby.
Antenatal Hand Expression: The "How" of Pre-Birth Supply
One of the most effective ways to support your future milk supply in the third trimester is through antenatal hand expression. This is the process of using your hands to gently express and collect colostrum before the baby is born. This practice is typically recommended starting around 37 weeks of pregnancy, provided you have a healthy, low-risk pregnancy.
If you want to learn more about hand expression itself, our article on whether expressing can increase milk supply is a useful companion read.
Why Express Colostrum Early?
Collecting colostrum can be a safety net. If your baby has trouble latching or needs extra blood sugar support after birth, you will already have a supply of your own milk ready to go. Beyond that, the act of hand expression helps you become familiar with your breasts. You learn where your milk ducts are and how your body responds to touch.
Studies suggest that moms who practice hand expression in the final weeks of pregnancy often feel more confident. This confidence can lead to a more successful breastfeeding start. It may also help "prime" the breast tissue, making the transition to full milk production smoother.
How to Safely Hand Express
Always consult your healthcare provider before starting this practice, as nipple stimulation can sometimes trigger uterine contractions. If you get the green light, follow these steps:
- Find a comfortable spot: Use a warm compress on your breasts for a few minutes to encourage flow.
- The "C" Hold: Place your thumb and fingers in a "C" shape about an inch or two back from your nipple.
- Press and Release: Gently press back toward your chest wall, then compress your fingers together. Avoid sliding your fingers over the skin, as this can cause bruising.
- Collect the Drops: Use a small, sterile oral syringe to collect the tiny drops of colostrum.
- Store Safely: Label the syringes and store them in the freezer to take to the hospital or birthing center.
What to do next:
- Talk to your OB-GYN or midwife about antenatal expression at your next 36-week appointment.
- Purchase a few 1ml or 3ml sterile syringes.
- Practice for just 5–10 minutes once or twice a day once you hit 37 weeks.
Optimizing Nutrition for Future Lactation
What you eat in your third trimester supports your baby’s growth, but it also prepares your body for the caloric marathon of breastfeeding. Producing milk requires a significant amount of energy—roughly 500 extra calories a day once the baby is here. Starting a nourishing routine now can make that transition easier.
Focus on Protein and Healthy Fats
Your body needs protein to build and repair the tissues involved in milk production. Aim for high-quality sources like eggs, lean meats, beans, and Greek yogurt. Healthy fats, such as those found in avocados, nuts, and salmon, are essential for the development of your baby’s brain and will eventually help enrich your breast milk.
Hydration is Essential
Hydration is one of the most overlooked factors in milk supply. While drinking gallons of water won't "force" your body to make more milk, being dehydrated can certainly hinder production. In the third trimester, your blood volume has increased significantly, and your body is busy producing amniotic fluid.
To support your system, we recommend choosing drinks that provide electrolytes along with hydration. Our Lactation Drinks, such as Pumpin' Punch™ or Milky Melon™, are excellent options to keep in your pantry. They provide a refreshing way to stay hydrated while including ingredients that support lactation health as you move into the postpartum period.
Incorporating Supportive Ingredients
Many parents find comfort in adding gentle galactagogues to their diet in the final weeks. A galactagogue is simply a substance or food that may help support milk production. Common examples include oats, flaxseed, and brewer’s yeast.
Our Emergency Lactation Brownies and lactation snacks are a favorite for many moms-to-be. They are a delicious way to enjoy these supportive ingredients without having to spend hours in the kitchen during your final, exhausted weeks of pregnancy.
Note: This product is not intended to diagnose, treat, cure, or prevent any disease. Consult with your healthcare provider for medical advice before starting any new supplement or herbal regimen.
Addressing Medical Factors and Potential Challenges
Sometimes, the concern about how to increase milk supply in third trimester stems from underlying health conditions. It is important to know if you have factors that might make the early days of breastfeeding more challenging. Identifying these now allows you to create a proactive plan.
If you know you may need personalized breastfeeding support, our Certified Lactation Consultant Breastfeeding Help page is a helpful place to start.
Diabetes and PCOS
If you have a history of gestational diabetes, Type 1 or Type 2 diabetes, or Polycystic Ovary Syndrome (PCOS), your milk might take a little longer to come in. This is often due to the way insulin interacts with the mammary receptors. If you have these conditions, antenatal hand expression is even more beneficial, as it helps jumpstart the hormonal process early.
Thyroid Health
The thyroid is the "master controller" of many hormones in your body, including those responsible for milk production. If your thyroid levels are off, your supply may suffer. If you have a known thyroid condition, ensure your healthcare provider checks your levels in the third trimester and again shortly after birth.
Breast Anatomy and Previous Surgery
If you have had breast surgery (reduction or augmentation) or if you have concerns about the way your breasts have developed during pregnancy, now is the time to speak up. Not all surgeries impact breastfeeding, but some can affect the ducts or nerves. A prenatal consultation with an International Board Certified Lactation Consultant (IBCLC) can help you set realistic expectations and create a specialized feeding plan.
Building Your Postpartum Support Village
You cannot "will" your milk supply into existence through stress. In fact, high levels of stress hormones like cortisol can actually inhibit the let-down reflex. The let-down reflex is the process where your body releases milk from the ducts so the baby can drink.
One of the best ways to protect your future supply is to reduce the stress you will face after birth.
Choose Your IBCLC Now
Do not wait until you are crying in the middle of the night with a hungry baby to look for help. Research local lactation consultants or check if your insurance covers virtual visits. Having a professional you can call on day two or three can be the difference between continuing your journey and feeling like you need to stop.
The Power of Education
Knowledge is a powerful tool against the anxiety of low supply. Many parents mistake normal newborn behavior for a lack of milk. For example, cluster feeding—when a baby wants to eat every hour—is a natural way for the baby to tell your body to make more milk. It is not necessarily a sign that you are "empty." Taking an online breastfeeding class during your third trimester will help you recognize these cues so you don't panic when they happen.
If you want a deeper look at this stage, read our guide on how cluster feeding affects milk supply.
Prepare Your Environment
The first few weeks should be spent in what we call the "nursing nest." This is a comfortable spot where you have everything you need within arm's reach. Your focus should be on skin-to-skin contact and frequent feeding.
- Stock the freezer: Fill your freezer with easy-to-reheat meals.
- Set boundaries: Let friends and family know that for the first two weeks, you will be focusing on bonding and feeding.
- Assign tasks: Make a list of chores (laundry, dishes, walking the dog) that your partner or visitors can handle.
Selecting the Right Tools for Success
While you don't need a lot of gear to breastfeed, having the right tools can support your supply if challenges arise.
Get Your Breast Pump Ready
Most health insurance plans in the US cover the cost of a breast pump. The third trimester is the perfect time to order yours. Once it arrives, open the box! You don't need to start pumping yet, but you should wash the parts and learn how the buttons work.
Check your flange size as well. The flange is the plastic funnel that fits over your nipple. If it is too large or too small, it can cause pain and prevent the pump from removing milk effectively. Proper milk removal is the primary way to maintain and increase your supply once the baby is born.
If you are building a pumping plan, our Pump Hero™ supplement is designed for breastfeeding support after birth.
Herbal Support Options
Some parents choose to start herbal supplements shortly after birth to support their supply. We offer a variety of targeted blends like Pumping Queen™, Milk Goddess™, and Pump Hero™. These are formulated by our founder, Krystal Duhaney, who is a Registered Nurse and IBCLC. They are designed to support the specific needs of breastfeeding parents without the use of common fillers or ingredients that some families prefer to avoid.
Medical Disclaimer: These products are not intended to diagnose, treat, cure, or prevent any disease. Always consult with your healthcare provider or a certified lactation consultant before starting any herbal supplements, especially while pregnant or nursing.
The Role of the Birth Plan in Milk Supply
The way your baby enters the world can have an impact on how quickly your milk comes in. While we cannot always control how birth happens, you can include specific requests in your birth plan that support lactation.
Immediate Skin-to-Skin
Ask for "the golden hour." This is the first hour after birth where the baby is placed directly on your bare chest. This skin-to-skin contact (also called kangaroo care) triggers a massive release of oxytocin. Oxytocin is the hormone responsible for the let-down reflex and for helping you bond with your baby. It is one of the strongest signals to your body that it is time to start making milk.
Delay Non-Essential Procedures
Weight checks, baths, and eye ointments can usually wait an hour. Prioritizing the first feed during that initial alert period helps establish the "supply and demand" cycle. The more frequently milk is removed from the breast in those first few days, the more milk your body will produce in the long run.
Rooming-In
If you are giving birth in a hospital, request "rooming-in." This means your baby stays in the room with you rather than in a nursery. Being close to your baby allows you to see early hunger cues, such as rooting, sucking on hands, or fluttering eyelids. Feeding at the very first sign of hunger—rather than waiting for the baby to cry—leads to a more relaxed baby and a better latch.
Practical Steps Summary
To help you stay focused during these last few weeks, here is a quick checklist of actions you can take to support your future supply:
- Consult your doctor about starting hand expression at 37 weeks.
- Order your breast pump through insurance and check the flange fit.
- Focus on hydration by drinking plenty of water and using electrolyte-rich Lactation Drinks.
- Eat for energy by incorporating oats, healthy fats, and protein-rich snacks like our Emergency Lactation Brownies.
- Educate yourself on newborn feeding cues and the reality of cluster feeding.
- Book a prenatal consult with an IBCLC if you have underlying health conditions like PCOS or diabetes.
Key Takeaway: Increasing your supply in the third trimester is about education, preparation, and hormonal priming. By setting the stage now, you are making the transition to breastfeeding much smoother for both you and your baby.
Why Your Well-Being Matters Most
We know that there is a lot of pressure on new moms to "do everything right." It is important to remember that breastfeeding is a relationship, and every relationship has a learning curve. If you find that your milk is slow to come in or you face hurdles in the beginning, it is not a reflection of your worth as a parent.
Your body is amazing. It has grown a human being from scratch. Breasts were literally created to feed human babies, and for the vast majority of people, the system works exactly as intended. However, if you do need a little extra support, there is no shame in reaching out for help or using supplements and treats to give your body a boost.
Every drop counts. Whether you provide your baby with one ounce of breast milk or exclusive breastfeeding for a year, you are giving them incredible benefits. But your mental health and well-being are just as important as the milk you produce.
Conclusion
Preparing for breastfeeding in your third trimester is an act of love for yourself and your baby. By understanding how your hormones work, practicing safe hand expression, and focusing on high-quality nutrition, you are giving your body the tools it needs to succeed. Remember to stay hydrated, keep your stress levels low, and build a support system that empowers you.
- Preparation builds confidence.
- Hydration and nutrition are your foundation.
- Support is available whenever you need it.
"Breastfeeding is a natural act, but it is also a learned skill. Give yourself the grace to be a beginner."
At Milky Mama, we are here to support you through every stage of this journey. From our nourishing snacks to our expert lactation advice, we want to help you feel prepared and empowered. You are doing an amazing job already, and we can't wait to see you thrive in your breastfeeding journey.
FAQ
Is it safe to try to increase my milk supply before my baby is born?
In the third trimester, "increasing supply" really means preparing your body. You should not use a breast pump before birth unless specifically instructed by a doctor, as it can cause contractions. However, gentle hand expression of colostrum after 37 weeks is generally considered safe for low-risk pregnancies and is a great way to prime your system.
Can what I eat in the third trimester really affect my milk later?
Yes, your nutritional status in late pregnancy helps build the energy stores your body needs for lactation. Focusing on protein, healthy fats, and hydrating fluids creates a healthy environment for milk production. Including gentle ingredients like oats and flaxseed in your diet now can also be a helpful way to prepare your body for the demands of feeding a newborn.
Will I definitely have a low supply if I don't leak colostrum during pregnancy?
Not at all. Whether or not you leak colostrum during pregnancy is not an indicator of your future milk supply. Many people never see a single drop of milk until after their baby is born and they still go on to have a full, robust supply. Every body responds to pregnancy hormones differently.
Can I take lactation supplements while I am still pregnant?
It is usually best to wait until after your baby is born to start herbal lactation supplements. During the third trimester, focus on whole-food nutrition and hydration. Once your baby arrives and your progesterone levels drop, supplements can be a helpful tool to support your supply as it transitions from colostrum to mature milk. Always discuss any new supplements with your healthcare provider.
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