Three separate things get called the mummy tummy. Only one of them is fat. By Pranav Raut, postpartum coach for NRI mothers.
The short answer
The belly that won’t go after a baby is usually more than one problem. It’s up to three, stacked on top of each other, and each one needs a different answer.
The first is a separation in the abdominal muscles, which is structural and has nothing to do with fat. The second is fluid and tissue change, which settles over months. The third is actual body fat, which responds to the same things body fat always responds to.
Most mothers go after all three with crunches and a smaller plate. Crunches can make the first one worse, and a smaller plate does nothing for it, which is why the belly stays put while everything else changes.
Problem one: the separation
During pregnancy your abdominal wall stretches to make room. The two long bands of muscle down the front of your belly can pull apart at the midline, and the connective tissue between them thins and slackens.
If your belly still pushes outward, particularly in the evening or when you sit up, this is often the cause. What you’re seeing is a wall that has stopped holding tension.
That matters for what you do next. Fat loss won’t fix a separation, because fat isn’t the cause, and crunches can widen it, because a crunch pushes pressure against a wall that’s already weak.
You can check for it yourself in two minutes.
Lie on your back with your knees bent and your feet flat. Place two fingers flat above your navel, pointing towards your feet. Lift your head and shoulders slightly off the floor, the way the start of a small curl-up feels. As you lift, press your fingers gently into the midline and feel for a gap between the two firm ridges of muscle. Check at the navel, then a little below.
This is an informal self-screen, not a diagnosis. If the gap is two finger-widths or wider, or it feels soft and deep with no firm floor beneath your fingers, get it assessed properly.
What helps is deep core and breathing work, rebuilt in order, with the pelvic floor trained alongside it. What doesn’t help is crunches, sit-ups, planks held badly, and anything that makes your belly dome or push outward down the middle.
With that work the gap narrows for most mothers, and many close it over the following six to twelve months. Some separation can remain, particularly after more than one pregnancy, and that isn’t a failure. It’s also why I won’t promise you a flat stomach by a given date.
Problem two: fluid and tissue
Some of what you see in the first weeks and months is fluid, a uterus that’s still returning to size, and skin and connective tissue that were stretched for nine months. None of that is fat.
This settles largely on its own, on a timeline you don’t control. It’s also why the early weight drop after a birth isn’t the win it looks like, and why the scale tells you so little in this period.
There’s nothing to do about this one except not panic and not make decisions based on it.
Problem three: actual fat
Then there’s real body fat, and the news here is both good and dull.
The good part is that it responds to the same things it always has. The dull part is that you can’t choose where it comes off.
Spot reduction doesn’t work. No exercise removes fat from a particular area, and an abdominal workout burns belly fat about as well as a chewing exercise slims your face. Fat comes off your whole body in the order your body decides, which genetics influence heavily, and for many women the abdomen is among the later places.
That explains the most demoralising pattern in postpartum fat loss. Your face changes, your arms change, your clothes fit differently, and your belly looks much the same for a while. Nothing has gone wrong. You’re in the middle of the sequence, not at the end of it.
Two things that make it harder
Broken sleep affects appetite regulation and cravings. That’s measurable, it isn’t a character flaw, and it explains why the day after a bad night is the day the plan falls apart. You can’t fix the sleep while there’s a baby, but you can stop treating the next day’s hunger as a moral failure and plan protein into it instead.
Ongoing stress affects appetite, sleep, activity and eating patterns, and each of those makes weight management harder. The popular version, that stress hormones deposit fat on your belly specifically, is a tidier story than the evidence supports. What the evidence does support is that stress changes behaviour, and behaviour changes bodies.
So what works
The order matters, so follow it.
- First, rebuild the deep core and the pelvic floor. That means breathing, pelvic tilts, heel slides, glute bridges and Kegels. It deals with problem one, and it decides whether anything later works. If you had a caesarean, this waits for your doctor’s clearance and starts a block further back.
- Second, stop the movements that make it worse. No crunches, no sit-ups, nothing that domes, until any gap has closed.
- Third, get your protein up. Protein preserves muscle during fat loss, and muscle is what makes two kilos of loss look like five.
- Fourth, walk daily and build towards 8,000 steps. This is where the energy gap comes from, and it’s the part a tired mother can hold.
- Fifth, once recovery allows, add resistance work: twenty minutes, three or four times a week.
- Sixth, measure with a tape instead of a scale. Do it once a month under the same conditions, and take a photograph in the same light. The abdomen is often the last place to change, so the scale will mislead you and the tape won’t.
Be patient with problem three in particular. It’s the slowest of the three, and it’s the one everyone judges the whole project by.
What I wouldn’t do
More crunches are the first thing to skip. If your belly pushes outward, they’re the wrong tool, and they can make the gap worse.
I’d also skip the belt if you’re buying one to flatten anything. It can feel supportive in the early weeks, and your doctor may suggest one after a caesarean, but it only holds you in. It doesn’t close a separation and it doesn’t affect fat.
Don’t cut food hard to speed this up, particularly while feeding. And don’t judge three months of work by the belly, because the belly is the last thing to change.
Frequently asked questions
How long until the postpartum belly goes away?
There’s no single answer, because up to three different things are involved and each runs on its own timeline. Fluid and tissue settle over weeks and months without any help. A separation narrows for most mothers over six to twelve months with the right work. Fat comes off in the order your body chooses, and the abdomen is often late in that order.
Will crunches flatten my stomach?
If you have a separation, they can make it worse. If you don’t, they still won’t remove fat from that area, because spot reduction doesn’t work.
Is a flat stomach realistic after two children?
Improvement is realistic for almost everyone. I won’t promise a specific appearance by a specific date, and anyone who does hasn’t examined you.
Why is my belly bigger in the evening?
It’s common, and usually a mix of digestion, bloating and a core that tires through the day. If the change is dramatic, mention it to your doctor.
The one line to take away
Work out which of the three things you’re dealing with before you decide what to do about your belly, because two of them don’t respond to dieting.
Where to go next
Parent Fitness Coach on Instagram carries our latest postpartum guidance and the experiences of the mothers we coach.
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If you want the full sequence written down, How to Get Your Pre-Pregnancy Body Back in 90 Days has the deep core and pelvic floor progression, the self-check in detail, the ninety-day workout plan with a separate caesarean track, and the Indian food chart behind the nutrition side. 232 pages.
Get the ebook: Click Here
If your self-check found a gap of two fingers or wider, get it assessed rather than working around it. A women’s health physiotherapist can examine you directly, which no book can do.
If you would like your nutrition and training planned together around your own reports, you can book a one-to-one consultation call.
Book a one-to-one call: Click Here
Mothers describe their experience in their own words in this video interview series.
Watch the interviews: Click Here
About the author
Pranav Raut is a postpartum coach for NRI mothers and the founder of Parent Fitness Coach and the Reverse Fat System. A certified nutritionist, he has spent six years in the postpartum space and coached more than 1,000 working mothers, including NRI mothers in the USA, Canada, the UK, Switzerland, Iceland, Singapore, Doha and Dubai.
This article is for education and is not medical advice. Do not ignore the advice of your healthcare professional.