Breastfeeding Doesn’t Always Equal Weight Loss
One thing I heard a lot after having a baby was:
“Breastfeeding makes the weight fall off.”
And for some people… it genuinely does.
But for a lot of mums, it doesn’t feel like that at all.
Sometimes the weight stays exactly the same.
Sometimes it feels impossible to shift.
And sometimes you actually gain weight while breastfeeding — even when you feel like you’re trying.
That can feel frustrating, especially when you’re eating better, moving more, and still not seeing what you expected.
If that’s been your experience too, you’re definitely not alone.
Why breastfeeding doesn’t always cause weight loss
Breastfeeding burns energy — but that doesn’t automatically mean weight loss.
Your body is doing a lot more than just burning calories.
For some mums, breastfeeding can also:
increase hunger significantly
increase snacking without even realising
encourage the body to hold onto fat stores
cause fluid retention
make you feel puffier or heavier than expected
slow weight loss altogether
Hormones play a big role here too.
Your body doesn’t just see breastfeeding as “calorie burning.”
Sometimes it sees it as:
“We need energy stored and available to keep making milk.”
That can feel very different on the scale.
A lot of mums also notice this alongside:
Walking more, improving food choices, or trying to increase protein… but still not seeing the shift they expected.
Which can feel confusing — because on paper it feels like it should be working.
It’s not in your head
If you feel heavier while breastfeeding…
or hungrier than usual…
or like your body composition feels different…
it doesn’t mean you’re doing anything wrong.
Breastfeeding affects more than just calorie burn.
It can affect:
appetite
energy levels
sleep
stress hormones
water retention
fat storage
how your body prioritises recovery
And when you add in broken sleep, healing postpartum, and trying to care for a baby at the same time — it’s a lot.
Your body is working hard, even if the scales aren’t moving the way you expected.
If you’re in the thick of early postpartum too, you might also like reading why your baby is suddenly so clingy, or sleep regression or development? — both can overlap a lot with how exhausted your body feels during this stage.
What helps: Products I actually used
These won’t change hormones overnight — but they’ve helped me feel better in my body while breastfeeding.
Walking Pad. Especially when baby’s asleep and I still want to get steps in without leaving the house. Even 10–20 minutes feels better than nothing.
Baby Carrier. Really helpful for getting outside when baby wants to be held but I need movement or fresh air. An easy way to get steps in without overthinking it.
Yoga Mat. For short home workouts, stretches, or just getting on the floor for 10 minutes while baby naps nearby. Low effort but realistic postpartum.
For some mums… it changes later
This is probably the bit people say less often:
For some mums, weight doesn’t shift until much later.
Sometimes:
after solids increase
after feeds reduce
after weaning
once hormones settle more
or simply months further into postpartum
Sometimes nothing changes… then suddenly later it does.
Even without doing anything massively differently.
That can feel frustrating when you’re in it — but it’s also very normal.
Bodies don’t all respond to breastfeeding the same way.
Final thought
Breastfeeding doesn’t equal weight loss for everyone.
And if it hasn’t for you — that doesn’t mean you’ve failed, eaten badly, or done something wrong.
Sometimes postpartum bodies hold on longer.
Sometimes hormones are louder than calorie maths.
And sometimes it just takes much longer than anyone warns you about.
This isn’t professional advice — just a simple breakdown of what I’ve found helpful.
Most of this is easier to understand visually.
I’ve put all my guides into one place so you can browse them properly.
FAQs
Can breastfeeding make you gain weight?
Yes — some mums do gain weight while breastfeeding. Increased hunger, hormones, lack of sleep, and your body holding onto energy stores can all play a part.
Why am I breastfeeding but not losing weight?
Because breastfeeding doesn’t automatically cause weight loss for everyone. Hormones and recovery can affect how your body stores and uses energy postpartum.
Does weight loss happen after weaning?
For some mums yes — but not always. Some notice changes once feeds reduce or hormones settle after weaning.
Can hormones stop postpartum weight loss?
They definitely can influence it. Hormones can affect appetite, fluid retention, fat storage, and how your body responds during breastfeeding.
Is it normal to feel heavier while breastfeeding?
Very normal. A lot of mums feel puffier, hungrier, or heavier while feeding — even if they’re moving more or eating differently.