I’ve hit a dreaded plateau in my postpartum weight loss journey. It’s frustrating, and it’s tempting to interpret it as failure and lose hope. But the more I learn about postpartum weight loss, the more I realize it’s okay, and even beneficial, to plateau periodically. If you find yourself in the same spot, take a deep breath with me, and let’s talk about it.
Why Postpartum Weight Loss Matters At All
Some people say, “You’re breastfeeding and you just made a human, so you shouldn’t be concerned about weight loss.” I understand what they’re trying to say, and indeed, there are lots of things happening in the body postpartum (we’ll get to those in a bit). But weight loss is still an important part of the healing process.
If I was in a healthy weight range for my height already, I might agree with you. But that’s not the case for me. I could go on about the relationship between a high BMI and risk of disease, but instead I’ll just leave you with this NIH article and a few key stats about weight ranges in women:
- In a 2017-2018 study, 27.5% of US adult women were overweight, and 41.9% were obese or severely obese, which by my calculations indicates that roughly 70% of US women are outside of a normal weight range.
- During postpartum, women face even tougher odds. One study found:
- Women with a pre-pregnancy BMI in the overweight category have approximately a 3.2-fold higher risk of retaining excessive weight (≥20 lbs) one year postpartum.
- Women who are obese before pregnancy have a 3.8-fold higher risk.
- Even among women who had a normal pre-pregnancy BMI, one third of them became overweight or obese 1 year postpartum.
These aren’t just numbers on a page to me; they’re personal. Given that my pre-pregnancy BMI was overweight and my current weight (188 lbs) puts me in the clinically obese category for my height (5’4″), I know from these studies that the odds are stacked against me. But I’m stubborn, and I refuse to accept a fate of being overweight at 1 year postpartum, because I know my body was designed to be healthy. So I’m choosing to do whatever I can to get my body to a state of metabolic health.
Easier Said Than Done
As important as it is, postpartum weight loss has a unique set of challenges. Your body isn’t just returning to its pre-pregnancy state—it’s also producing milk, healing from birth, recalibrating hormones, and adapting to the constant demands of caring for a newborn. That’s a lot of moving parts.
For me, the first few weeks postpartum felt like I was losing weight almost effortlessly. A lot of that was fluid. My blood volume was decreasing, swelling was going down, and my body was releasing the extra water it had been holding on to during pregnancy. But after that initial drop, things slowed down… a lot. And eventually, I hit a plateau.
At first, I wanted to fight it. I tightened up my eating habits and paid closer attention to my calories and protein intake, thinking I just wasn’t trying hard enough. But here’s what I’ve learned: sometimes a plateau isn’t your body refusing to cooperate. It’s your body doing exactly what it’s supposed to do.
Why Plateaus Happen Postpartum
Postpartum weight loss isn’t linear because multiple systems are interacting at the same time:
- Hormones are still in flux. Progesterone, estrogen, cortisol, and prolactin each affect metabolism, appetite, and fat storage. Prolactin in particular (the milk-making hormone) can promote fat retention, which is nature’s way of ensuring you have enough reserves for breastfeeding.
- Breastfeeding changes energy needs daily. While breastfeeding does burn calories, it also tends to increase appetite, which can lead to eating more than the calorie burn accounts for, especially when sleep deprivation kicks in.
- Your body is protecting recovery. If you’re still healing (which can take many months), your system may deliberately hold onto weight to protect energy stores and reduce perceived stress.
- Fluid shifts can mask fat loss. Hormones and inflammation can cause your body to hold onto extra water at times, even when you’re in a calorie deficit.
For me, the plateau I’m in right now is a mix of all these factors. My prolactin is still high because I’m exclusively breastfeeding, my sleep is inconsistent (thank you, night feedings), and I’m still in the early postpartum recovery window where my body is prioritizing healing over dropping fat rapidly. Postpartum healing happens in stages, and each stage affects weight loss differently.
Postpartum Weight Loss Factors Timeline
0–6 Weeks Postpartum: Rapid shifts, mostly fluid-related
Most influential factors:
- Hormone drop (estrogen & progesterone) → Large initial water loss
- Prolactin increase → Begins water retention for milk production
- Cortisol spikes from recovery stress → Can mask loss with fluid
- Inflammation from healing → Temporary water retention
Expect a big drop in first 1–2 weeks from fluid, then a possible plateau as your body stabilizes and milk supply is established.
6–12 Weeks Postpartum: Metabolic reset phase (I am * here *)
Most influential factors:
- Breastfeeding calorie burn → +300–500 cal/day potential
- Breastfeeding hunger signals → Can offset calorie burn if eating above needs
- Insulin sensitivity improving → Gradually better carb metabolism
- Cortisol from sleep deprivation → Slows fat loss, retains fluid
- Menstrual cycle return (for some) → Fluid fluctuations
Fat loss may be slow but steady if intake matches output. The scale may not move much, but body composition is often improving.
3–6 Months Postpartum: First “real” fat loss stage for many
Most influential factors:
- Stable milk supply → Less protective metabolic slowdown
- Gentle strength training → Builds lean mass, boosts metabolism
- Adequate protein & micronutrients → Prevents muscle loss
- Cortisol & stress management → More “whoosh” drops after stress events resolve
- Cycle-related fluid shifts → Predictable ups/downs
Fat loss becomes more visible, especially with balanced eating and resistance training. Plateaus often happen from water retention, not stalled fat loss.
6–12 Months Postpartum: Long-term rhythm
Most influential factors:
- Milk production tapering (for some) → Energy expenditure changes
- Exercise intensity increase → More muscle + improved insulin sensitivity
- Menstrual cycles regular → Easier to predict fluid retention patterns
- Calorie needs drop slightly after weaning → May need small intake adjustment
Weight loss is more responsive to diet and exercise changes. Fluid shifts are easier to anticipate. Composition changes can accelerate.
How I’m Mentally Coping
I’m choosing to see this plateau not as a dead end but as a pit stop where my body is refueling, reassessing, and recomposing itself. Here’s how I’m supporting my body and emotions in the meantime:
- Tracking trends, not days. Daily weigh-ins can be useful for spotting patterns, but I focus on weekly averages so I’m not discouraged by normal fluctuations.
- Supporting my hormones through nutrition. I’m focusing on protein-rich meals, whole-food carbs, and healthy fats to stabilize blood sugar and support healing.
- Managing stress where I can. Even short walks outside, stretching, and five minutes of deep breathing help bring my cortisol down.
- Prioritizing sleep over perfection. Some nights, I go to bed with laundry in the machine because I know rest will serve my health more than having all the clothes put away perfectly.
- Exercising with intention, not desperation. I’m focused on strength-building, core repair, and day-to-day consistency. For this season of life, that’s plenty. More isn’t the answer; quality is. (That deserves its own blog post!)
The Big Picture
I’ve had to remind myself that postpartum isn’t just about getting smaller—it’s about getting stronger, more balanced, and metabolically healthy. The number on the scale is only one measure of progress.
When I zoom out, I see that I’m already eating better than I did before pregnancy. I’m moving more intentionally and consistently than I did before pregnancy. I most importantly, I’m feeling more in tune with my body’s signals.
The goal is not to achieve a weight. The goal is to move toward metabolic health. Even during a plateau, I’m achieving that goal every single day.
That’s progress. And progress, especially postpartum, is rarely a straight line. Plateaus aren’t punishment; they’re proof that your body is working through a process. And in postpartum life, the process is where the real transformation happens.
References
- Risks Associated With Overweight & Obesity
- Overweight & Obesity Statistics
- Postpartum Weight Retention Risk Factors and Relationship to Obesity at One Year
