Postpartum weight loss: realistic and achievable

What do you lose straight after giving birth?

The first kilos disappear by themselves, before you have to do anything for them. Straight after giving birth you are usually 5 to 7 kilos lighter because of the weight of your baby, the placenta and the amniotic fluid, as the university hospital UZ Leuven explains.

It doesn't stop there. During your pregnancy your body built up extra fluid and blood. You lose that in the first two weeks: you pass urine more often and sweat more, sometimes at night too. That way a few more kilos disappear without any diet or effort.

Many women are actually alarmed by this rapid weight loss after giving birth and wonder whether it's right. It's normal: your body is clearing out what it needed for the pregnancy. Your womb also shrinks back to its former size in about six weeks, which makes your belly visibly slimmer.

A practical tip for this phase: don't step on the scales every day in the first two weeks. Your fluid balance fluctuates so much then that the number says little and mainly causes unease. If you do want to weigh yourself, do it at most once a week, at the same time of day.

What remains after that is the fat reserve your body deliberately built up to feed your baby. That reserve is not a sign of failure but of a body that did exactly what it had to do. And for those kilos in particular: taking it slowly works better than rushing in.

How long does weight loss after pregnancy take?

Allow 9 to 12 months to lose your pregnancy kilos, and longer if you gained more. The rule of thumb "nine months on, nine months off" is not a platitude but a realistic frame of expectation. If you want to lose 20 kilos after giving birth, it's perfectly reasonable to allow a year and a half for it.

This is what it looks like per phase:

When you start losing weight after giving birth matters at least as much as how fast. The first six weeks are for recovery; after that you can build up gradually. If you start too early or too fanatically, you often pay for it in fatigue, setbacks or injuries.

There is also a side that isn't about kilos. Many women feel pressure to be "themselves" again quickly, while their body is still recovering and the nights are short. That pressure backfires: stress demonstrably makes weight loss harder and takes the joy out of a period that is intense enough already. A realistic timeline is therefore not a consolation prize, but the approach with the best chance of lasting results.

One more thing to remember when you read about other people's experiences with weight loss after pregnancy on forums and social media: those stories vary enormously, and that's how it should be. One woman is back at her old weight within four months, another takes two years. How much you gained, whether you breastfeed, what your nights are like and whether this is your first or third child: it all counts. After a second or third pregnancy it also often goes more slowly than the first time. So compare yourself with your own previous week rather than with someone else.

And those very last kilos? They are almost always the most stubborn, pregnancy or not. Why that is and what you can do about it, you can read in losing the last few kilos.

Why am I not losing weight after pregnancy? The role of hormones

If losing weight after your pregnancy isn't working, it's rarely down to your discipline. After giving birth your hormonal balance changes profoundly, and some of those changes actively work against weight loss. This is the part of the explanation that many articles leave out, while it explains exactly why "just eating less" doesn't feel simple right now.

Three hormones play the leading role:

• Prolactin drives your milk production and stays high as long as you breastfeed. It increases your appetite and helps your body hold on to reserves: useful for your baby, frustrating on the scales.
• Cortisol, your stress hormone, rises with broken nights and caring for a baby. A persistently high cortisol level puts your body in saving mode and promotes fat storage, especially around your belly.
• Oestrogen is actually low after giving birth. That affects your energy, your mood and where your body stores fat.

On top of that comes lack of sleep. If you consistently sleep too little, you produce more hunger hormone and less satiety hormone. You are then literally hungrier, especially for fast carbohydrates, and have less energy to move. Not a weakness of character, but biology.

Sometimes there's more going on. In some women the thyroid becomes temporarily dysregulated after giving birth, which makes losing weight extra difficult. Do you keep gaining weight despite eating healthily, or do you feel persistently exhausted, low or cold? Then discuss it with your GP (huisarts) and have your thyroid checked.

What can you do with this yourself? Less than diet gurus promise you, and that's exactly the point: you can't train or diet your hormones away after giving birth. What does help is improving the conditions in which they do their work:

• Lower the bar for now. Holding your weight steady in this phase is already an achievement; loss comes later.
• Protect your sleep where you can. Share the nights with your partner if possible, and nap with your baby during the day now and then.
• Keep your meals regular. Fixed mealtimes give your hormonal system something to hold on to and prevent grazing.
• Ask for help. An afternoon of babysitting or someone else doing the shopping is not a luxury but recovery.

Do you recognise this pattern outside of pregnancy too? In why am I not losing weight we list all the common causes, from saving mode to medication.

Are the scales not moving, whatever you try? Our own BIG-registered doctor (the BIG register is the Dutch register of healthcare professionals) looks at what is going on for you, one to one. See if it's right for you →

Weight loss and breastfeeding: what is safe?

Losing weight gradually while breastfeeding can be safe; strict dieting cannot. Breastfeeding costs energy: you need around 500 extra kilocalories per day to produce breast milk, according to the Voedingscentrum (the Netherlands Nutrition Centre). On a crash diet your body gets too few nutrients, your own diet becomes unbalanced and your milk production can drop.

The good news: that extra energy need means your body is already working hard. The Voedingscentrum states that with full breastfeeding, your weight at the end of the breastfeeding period is normally roughly back to its pre-pregnancy level, without you needing to diet.

It is also true that this doesn't apply to everyone. Some women actually find it harder to lose weight while they're feeding, because prolactin keeps appetite and reserves high. Do you notice that the kilos only start to shift after you wind down breastfeeding? That too is a normal pattern, not an exception.

What does work while you're feeding:

• Eat three proper meals with enough protein: it fills you up and protects your muscles.
• Choose wholegrain, vegetables and fruit over fast sugars, especially when tiredness makes you crave something.
• Drink plenty of water; thirst often feels like hunger.
• If you want to cut back deliberately, do it gently and keep an eye on your milk production. If in doubt, talk to your midwife (verloskundige) or the consultatiebureau (the Dutch child health clinic).

When you wind down breastfeeding, watch out for one common mistake: from that point on you no longer need the extra 500 kilocalories, but your eating pattern has got used to them. Many women notice that they gain weight without realising after stopping, because the bigger portions and snacks stick around. If you want to lose weight after the breastfeeding period, start by bringing your portions back step by step to your own needs, at the same pace at which you reduce the feeds.

Losing weight healthily after giving birth: recovery first, no crash diet

The fastest sustainable pace is not the pace of a crash diet, but that of a small, manageable calorie deficit. Around half a kilo per week is healthy; if you lose more than a kilo per week for weeks on end without choosing to, it's going too fast and it's wise to consult your midwife or GP.

Why no strict diet? Because it takes away exactly what you need most right now: energy, nutrients and muscle mass. Your metabolism responds to a large deficit by running more economically, so you regain weight faster after the diet. With a baby at home, that yo-yo effect is the last thing you need.

What does work, according to the science? A combination of healthy eating and more exercise: a systematic review in Nutrition Reviews (2018) shows that women using such a combined approach after giving birth lost an average of 2.5 kilos more than women without support, and they were still holding on to that difference a year after giving birth. Diet or exercise alone did clearly less.

In practice, that means:

1. Wait until the postnatal period is over. The first six weeks are for recovery; your body has just been through a birth.
2. Start with walking. Going out with the pram is exercise, daylight and rest all at once.
3. Build up exercise gradually, ideally after your postnatal check-up (nacontrole) and with attention to your pelvic floor.
4. Eat protein-rich and regularly: three meals, no skipped meals, no grazing out of tiredness.
5. Grab sleep where you can. Every hour of sleep you gain makes healthy choices easier.
6. Weigh yourself at most once a week. Daily fluctuations say nothing about your progress.

A similar build-up applies to exercise. For the first six weeks, walking and pelvic floor exercises are enough. After your postnatal check-up you can start training gently: think of swimming, cycling or a postnatal exercise class, two to three times a week.

Save more intensive exercise, such as running or jumping, until your pelvic floor can handle it; if you build it up too quickly, you'll often notice it through urine leakage or a heavy feeling low in your abdomen. Take that signal seriously and bring in a pelvic floor physiotherapist if needed. If you breastfeed, feed just before exercising: it makes exercising more comfortable, and your milk production doesn't suffer from moderately intensive exercise.

What does such a day look like in practice? Think of a breakfast of full-fat quark, oats and fruit, a wholegrain lunch with egg or chicken, and an evening meal where vegetables fill half your plate. In between, a handful of nuts or a piece of fruit instead of a biscuit with the umpteenth coffee. Nothing special, no forbidden lists: ordinary food you can prepare with a baby on your arm. It is precisely that ordinariness that makes it sustainable, and sustainability is what a diet usually lacks.

Losing weight quickly after giving birth sounds attractive, but here slow really is the new fast: if you lose weight gradually, you keep the result.

Belly fat after pregnancy (also after a caesarean)

Of all parts of your body, your belly needs the most time, and that's normal. Your womb takes about six weeks to shrink back. Your abdominal muscles were stretched during pregnancy and sometimes separated (diastasis), which makes your belly look rounder than it is. And because of your hormonal balance, the fat reserve around your waist is precisely the place your body holds on to longest.

You don't lose belly fat after pregnancy with ab exercises alone. Spot-reducing fat doesn't exist: crunches make your muscles stronger, but the fat above them only disappears by losing weight overall, with diet and exercise together. So combine general fat burning with gentle core and pelvic floor exercises. If you suspect diastasis, get guidance from a (pelvic floor) physiotherapist before you start training.

This is how to recognise diastasis: lie on your back with your knees bent, lift your head slightly and feel with two fingers just above and below your navel. If you feel a soft gap two fingers wide or more between your straight abdominal muscles, they are still separated. That is very common after a pregnancy and often recovers by itself, but heavy ab exercises can slow recovery. A pelvic floor physiotherapist can assess it and give you exercises that do help.

After a caesarean the same principle applies, with one difference: you are recovering from abdominal surgery. Give your scar and your abdominal wall six to eight weeks of rest, don't lift anything too heavy in the first weeks and only start exercising after your postnatal check-up. Losing weight after a caesarean then simply follows the route above, just with a later start. If your belly keeps a fold or overhang just above the scar for longer, that's normal and says nothing about your effort.

When is medical weight loss an option?

Medical weight loss comes into the picture if you have a BMI of 30 or higher and healthy eating and exercise aren't working, not even in the months after the breastfeeding period. So not as a first step, but as a fair next step when you've already tried everything and your body isn't cooperating. Calculate your BMI to see where you stand.

First, the most important point: during pregnancy and breastfeeding, weight loss medication is not an option. The use of GLP-1 medicines is advised against during pregnancy because there is insufficient experience with it, and restraint is also advised during breastfeeding, according to the Farmacotherapeutisch Kompas (the Dutch national medicines reference) of Zorginstituut Nederland (the Dutch National Health Care Institute). If you want to have children, you stop, in consultation with the doctor, well before you want to become pregnant again. And never buy these medicines online without a prescription: you won't know what you're getting and no doctor is keeping an eye on you. More about weight loss medication and pregnancy.

Is that period over and does your weight stay put despite everything? Then medical weight loss with GLP-1 medication can be a serious option. These medicines mimic a hormone your body makes itself that regulates satiety: your hunger decreases, which makes healthy eating something you can keep up rather than a battle. Not a miracle cure, but an aid; side effects such as nausea and other stomach and bowel complaints mainly occur at the start, and it only works in combination with your own effort.

At Qlinic this happens entirely under medical supervision, in three steps:

1. Consultation and intake. You discuss your situation one to one with our own BIG-registered doctor, who assesses whether medical weight loss suits you from a medical point of view.
2. Prescription and home delivery. If it's suitable, your medication is delivered to your home. No waiting lists, no hassle.
3. Losing weight with supervision. The same doctor follows you throughout the programme, with a personal conversation every 4 weeks. Questions in between, for example about side effects, you discuss with the doctor.

Most participants notice the first effect after about 4 weeks: less hunger, more calm in your head around food. And important for new mothers who already have enough obligations: if you want to pause or stop, you discuss it with the doctor. Whether treatment is suitable for you depends on your medical situation; the doctor assesses that, not a form alone.

Who is this not for? If your BMI is under 30, medication is usually not on the table and the approach in this article will get you further. If you're looking for a quick fix without changing your eating pattern, you'll be disappointed: the medication supports behaviour change, it doesn't replace it. And if you're still breastfeeding or you're pregnant, the answer is, as mentioned: not now, maybe later.

Tried everything and still not losing weight after your pregnancy? With a BMI of 30 or higher, our own doctor supports you personally, with contact every 4 weeks and home delivery. See if it's right for you →

Frequently asked questions about postpartum weight loss

How long after giving birth do you lose weight?

Most women take 9 to 12 months to lose their pregnancy kilos. You lose the first 5 to 7 kilos straight away at the birth, extra fluid disappears in the first two weeks, and after that around half a kilo per week is a healthy pace.

Why am I losing so much weight after giving birth?

Straight after giving birth you lose the weight of your baby, the placenta and the amniotic fluid, together around 5 to 7 kilos. In the two weeks that follow, you pass and sweat out the extra fluid your body built up during pregnancy. That rapid loss is normal and no cause for concern.

What is the fastest way to lose weight after pregnancy?

The fastest pace you can also keep up: a small calorie deficit, protein-rich food and daily exercise, together good for around half a kilo per week. Crash diets backfire: you lose muscle mass, your metabolism slows down and if you're breastfeeding your milk production can drop.

How do you lose belly fat after pregnancy?

You lose belly fat by losing weight overall with healthy eating and exercise; burning it locally with ab exercises isn't possible. Give your belly time too: your womb takes six weeks to shrink, and stretched abdominal muscles or diastasis make your belly temporarily rounder. After a caesarean you only start after six to eight weeks of recovery.

Why am I not losing weight after pregnancy, even though I eat healthily?

After giving birth, hormones such as prolactin and cortisol work against weight loss: they increase your appetite and hold on to reserves. Lack of sleep and sometimes a dysregulated thyroid also play a part. So it's rarely down to your discipline. If it persists, discuss it with your GP or get medical support.

Can you use weight loss medication during pregnancy or breastfeeding?

No. GLP-1 medication is advised against during pregnancy, and restraint is also advised during breastfeeding. Medical weight loss is only an option after the pregnancy and breastfeeding period, always through a doctor with a prescription. Never buy weight loss medication online without a prescription.