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Over-Supply vs. Under-Supply: Pump Smart and Keep Baby’s Milk Just Right

Updated: Sep 21


 

When it comes to pumping breast milk, it’s all about balance. You want to make sure your baby is getting the right amount without overdoing it or falling short. Struggling with over-supply or under-supply? Let’s break down both sides, what causes them, how to spot them, and—most importantly—how to manage them!

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How Much Milk Does Your Baby Really Need?


Before we dive into the extremes, it’s helpful to know the sweet spot for milk production:

  • Babies typically consume 1-1.5 ounces of milk per hour while you're away.

  • In a 24-hour period, most babies between 1-6 months old drink 24-30 ounces.

  • If you’re away for 8 hours, expect to leave 8-12 ounces for your little one.


Pro Tip: Store milk in 3-4 ounce portions to avoid waste. You can always thaw more if needed!

 

The Battle: Over-Supply vs. Under-Supply

Let’s look at both challenges side by side.

 

Over-Supply


What is it? Over-supply happens when your body produces more milk than your baby needs, which can lead to discomfort for both you and your little one.


What Causes It?


  • Frequent Pumping: Pumping too often or for too long can trick your body into thinking your baby needs more milk than they actually do.

  • Hormonal Imbalances: Conditions like thyroid problems or certain medications can boost milk production.

  • Early Pumping: Pumping a lot before your baby latches properly can stimulate excess milk production.


Signs You Have Over-Supply:


  • Frequent Engorgement: Your breasts feel overly full and painful, even after feeding or pumping.

  • Fast Milk Flow: Your baby may struggle with coughing or choking due to the quick flow of milk.

  • Green, Frothy Diapers: This happens when your baby is getting too much foremilk and not enough hindmilk.

  • Large Freezer Stash: If your milk stash keeps growing faster than your baby can drink, it might be a sign you’re over-supplying.


Why Over-Supply Can Lead to Milk Deprivation: When you produce too much milk, your baby may fill up on the watery foremilk and miss out on the fatty, nutrient-rich hindmilk they need for growth. This can result in:

  • Frequent hunger

  • Digestive discomfort (gas, bloating)

  • Slow weight gain despite frequent feedings


How to Manage Over-Supply:


  • Block Feeding: Nurse from one breast for 2-3 hours before switching to the other. This helps regulate milk production and ensures your baby gets more hindmilk.

  • Don’t Over-Pump: Only pump enough to relieve discomfort, not to fully empty the breast. This helps avoid signaling your body to make more milk.

  • Breast Compression: Gently compress the breast during feeding to help your baby slow down and manage the milk flow better.


Pro Tip: If your baby is dealing with a fast flow of milk, try paced feeding. Let them sit upright to control the flow more easily.

 

Under-Supply


What is it? Under-supply is when your body isn’t producing enough milk to meet your baby’s needs, leading to frequent feedings and frustration.


What Causes It?


  • Latch Issues: If your baby isn’t latching well, they may not remove enough milk, signaling your body to produce less.

  • Hormonal Imbalances: Conditions like PCOS or thyroid issues can decrease milk production.

  • Stress or Fatigue: High-stress levels and exhaustion can negatively impact your milk supply.

  • Certain Medications: Hormonal birth control and other medications can interfere with milk production.


Signs You Have Under-Supply:


  • Fewer Wet Diapers: Your baby should have at least 6 wet diapers a day. If they have fewer, it could indicate a low milk supply.

  • Slow Weight Gain: If your baby isn’t gaining 5-7 ounces per week, it might be a sign of under-supply.

  • Frequent or Long Feedings: If your baby seems constantly hungry or is feeding for long periods without satisfaction, your milk supply might be low.

  • Low Pump Output: If you consistently pump less than 1 ounce per session, it may signal under-supply (though pump output doesn’t always reflect total supply).

 

How to Boost Your Supply Naturally


Boosting your milk supply can be achieved with some simple, natural methods:


  1. Stay Hydrated: Drink plenty of water—aim for at least 8-10 glasses a day. Adding coconut water or herbal teas like fenugreek or fennel tea can also help.

  2. Eat Nutrient-Rich Foods: Incorporate foods known to boost lactation, such as oats, fenugreek seeds, leafy greens, nuts & seeds, and protein-rich foods like quinoa and lean meats.

  3. Get Rest and Reduce Stress: Prioritize rest, take naps when possible, and try relaxation techniques like deep breathing or yoga to reduce stress. Ask for help when you need it to manage your load.

  4. Skin-to-Skin Contact: Spending time with your baby skin-to-skin encourages milk production and strengthens the bond with your baby.

  5. Breast Massage: Massaging your breasts before and during feedings can stimulate milk flow, while using a warm compress can help with let-down.

  6. Herbal Supplements: Consider herbal supplements like fenugreek, moringa, or blessed thistle, but always consult a lactation consultant or healthcare provider before starting.


Pro Tip: Don’t stress if you pump less on some days—it’s normal for supply to fluctuate throughout the day! Focus on small, consistent steps, and your supply will gradually increase.

 

How to Find Your Perfect Balance


Whether you're dealing with over-supply or under-supply, here’s how you can maintain a balanced milk supply and keep your baby well-fed and happy:


For Over-Supply:

  • Block Feeding: Stick to one breast for a longer period to help balance milk production.

  • Pump Less: Only pump to relieve engorgement, not to fully empty the breast.

  • Breast Compression: Use gentle compressions to help your baby manage the milk flow.

For Under-Supply:

  • Hydrate and Eat Well: Focus on foods and drinks that support milk production and keep your body nourished.

  • Rest and Reduce Stress: Make self-care and stress management a priority to keep your milk flowing.

 

Final Thoughts: Striking the Right Balance


Finding the right milk supply for your baby can feel like a challenge, but whether you're over-supplying or under-supplying, there are ways to regain balance. Keep an eye on your baby’s hunger cues, diaper output, and growth to ensure they’re getting the nourishment they need. If you're unsure or struggling, don’t hesitate to reach out to a lactation consultant for personalized advice.


Remember: Every breastfeeding journey is unique, and with the right support, you can pump smart and keep your baby’s milk just right!


 

We Can Help!


If you’re unsure about your milk supply or need guidance on balancing over-supply or under-supply, we’re here to help. At Breast Choice Lactation, we offer personalized lactation consultations, expert advice, and ongoing support to help you through your breastfeeding journey. Whether you’re looking for one-on-one consultations or just need a bit of advice, we’ve got you covered.

Reach out today to schedule a session and ensure your breastfeeding experience is smooth and stress-free. We’re here to empower and support you every step of the way!




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