Pregnancy
Weight in pregnancy: what’s normal
Official advice on weight differs more between countries than most parents expect. Here it is side by side, together or on your own: what each health service says, with no targets of our own and no calculator.
In short
- How often you are weighed depends on the country: in the UK, Ireland and Italy weight or BMI is taken at the first appointment, in Germany at every check-up.
- How much gain is usual depends on your weight before pregnancy. Where an official number exists, it is an average or a range, not a target.
- None of these health services says to eat for two: needs rise only a little, and in the UK and Germany only in the last months.
- Every one of them advises against dieting to lose weight in pregnancy.
- If you are worried about your weight, talk to your midwife or doctor.
Will I be weighed at every appointment?
| Country | What the official sources say |
|---|---|
| United Kingdom | Weight and BMI at the first (booking) appointment. You may be weighed again later if there is a reason. |
| Ireland | Weight, height and BMI at the first (booking) appointment. |
| Germany | At every check-up (about every four weeks), with blood pressure and a urine test. |
| Italy | BMI at the first visit. With a normal BMI, weight is not measured at every visit, only when there is a clinical reason. |
Checked against National Institute for Health and Care Excellence (NICE, and its Clinical Knowledge Summaries), Royal College of Obstetricians and Gynaecologists (RCOG), The Rotunda Hospital, Dublin (public maternity hospital), Institute of Obstetricians and Gynaecologists, Royal College of Physicians of Ireland (national clinical guidelines), Gemeinsamer Bundesausschuss (G-BA), Bundesministerium für Gesundheit (and its portal gesund.bund.de), Bundesinstitut für Öffentliche Gesundheit (BIÖG: infektionsschutz.de, familienplanung.de, kindergesundheit-info.de), Istituto Superiore di Sanità (EpiCentro, ISSalute), Associazione Ostetrici Ginecologi Ospedalieri Italiani (AOGOI), checked on 13 October 2026
What the official pages say
“offer to measure the person's height and weight and calculate BMI at the first face-to-face antenatal appointment”
National Institute for Health and Care Excellence (NICE, and its Clinical Knowledge Summaries), read on 13 October 2026“Do not routinely offer to weigh people throughout their pregnancy unless there is a clinical reason to do so (for example, gestational diabetes, hyperemesis gravidarum or thromboprophylaxis).”
National Institute for Health and Care Excellence (NICE, and its Clinical Knowledge Summaries), read on 13 October 2026“Your BMI will be calculated at your first antenatal booking appointment.”
Royal College of Obstetricians and Gynaecologists (RCOG), read on 13 October 2026“You may be weighed again later in your pregnancy.”
Royal College of Obstetricians and Gynaecologists (RCOG), read on 13 October 2026“Your weight, height and BMI will be measured at your first antenatal appointment.”
The Rotunda Hospital, Dublin (public maternity hospital), read on 13 October 2026“check maternal weight and height at an antenatal booking visit.”
“Die nachfolgenden Untersuchungen sollen - unabhängig von der Behandlung von Beschwerden und Krankheitserscheinungen - im Allgemeinen im Abstand von vier Wochen stattfinden und umfassen:”
Gemeinsamer Bundesausschuss (G-BA), read on 13 October 2026“Blutdruckmessung, 2. Gewichtskontrolle,”
Gemeinsamer Bundesausschuss (G-BA), read on 13 October 2026“Bei jeder Vorsorgeuntersuchung werden der Blutdruck und das Gewicht der Schwangeren notiert sowie der Urin untersucht.”
Bundesministerium für Gesundheit (and its portal gesund.bund.de), read on 13 October 2026“Bei der Schwangerenvorsorge gibt es regelmäßig Gewichtskontrollen.”
“La misurazione dell’indice di massa corporea deve essere offerta a tutte le donne in gravidanza al primo bilancio di salute.”
Istituto Superiore di Sanità (EpiCentro, ISSalute), read on 13 October 2026“La misurazione routinaria del peso non dovrebbe essere offerta ad ogni bilancio di salute alle donne con IMC normopeso (18,5-24,9 kg/m2).”
Istituto Superiore di Sanità (EpiCentro, ISSalute), read on 13 October 2026“Si raccomanda la rilevazione del BMI alla prima visita e la misurazione regolare della pressione arteriosa.”
Associazione Ostetrici Ginecologi Ospedalieri Italiani (AOGOI), read on 13 October 2026“Il peso va monitorato solo se clinicamente indicato.”
Associazione Ostetrici Ginecologi Ospedalieri Italiani (AOGOI), read on 13 October 2026
How much weight is normal to gain?
| Country | What the official sources say |
|---|---|
| United Kingdom | Usually 10 to 12.5 kg (22 to 28 lb) in total. An average, not a target: NICE says the evidence does not show an ideal amount. |
| Ireland | From a healthy weight before pregnancy: about 0.5 kg a week from around 12 weeks. No total is given. |
| Germany | Depends on your weight before pregnancy. At a normal weight (BMI 18.5 to 24.9): 11.5 to 16 kg. |
These are averages and ranges from official sources, never a target to hit. The right amount depends on your starting point, which your midwife or doctor knows; that is why this page has no calculator.
Checked against NHS (nhs.uk), nidirect (Northern Ireland), National Institute for Health and Care Excellence (NICE, and its Clinical Knowledge Summaries), Health Service Executive (HSE), The National Maternity Hospital, Holles Street (public maternity hospital), Institut für Qualität und Wirtschaftlichkeit im Gesundheitswesen (IQWiG, gesundheitsinformation.de), Bundesministerium für Gesundheit (and its portal gesund.bund.de), Bundesinstitut für Öffentliche Gesundheit (BIÖG: infektionsschutz.de, familienplanung.de, kindergesundheit-info.de), checked on 13 October 2026
What the official pages say
“Most pregnant women gain between 10kg and 12.5kg (22lb to 28lb), putting on most of the weight after week 20.”
NHS (nhs.uk), read on 13 October 2026“During pregnancy, the average amount of weight gain is 10 to 12.5kg (22 to 28lb).”
nidirect (Northern Ireland), read on 13 October 2026“There is a lack of evidence about what the optimal total weight change in pregnancy or weight change in each trimester should be.”
National Institute for Health and Care Excellence (NICE, and its Clinical Knowledge Summaries), read on 13 October 2026“If you have a healthy weight before you become pregnant, expect to gain 0.5kg per week in the second and third trimesters.”
Health Service Executive (HSE), read on 13 October 2026“You can expect to gain about 0.5kg a week on average from 12 weeks on.”
The National Maternity Hospital, Holles Street (public maternity hospital), read on 13 October 2026“bei Normalgewicht vor der Schwangerschaft ( BMI zwischen 18,5 und 24,9): zwischen 11,5 und 16 kg”
Institut für Qualität und Wirtschaftlichkeit im Gesundheitswesen (IQWiG, gesundheitsinformation.de), read on 13 October 2026“Für normalgewichtige Frauen (BMI zwischen 18,5 und 24,9) ist eine Gewichtszunahme zwischen 11,5 und 16 Kilogramm vollkommen in Ordnung.”
Bundesministerium für Gesundheit (and its portal gesund.bund.de), read on 13 October 2026“11,5 bis 16 kg bei Frauen mit Normalgewicht (BMI 18,5 bis 24,9 kg/m²)”
Do I need to eat for two?
| Country | What the official sources say |
|---|---|
| United Kingdom | No need to eat for two. Only in the last three months: about 200 extra calories a day. |
| Ireland | You do not need to eat twice as much; what you eat counts more than how much. |
| Germany | Energy needs rise only slightly, and only in the last months: think for two, do not eat for two. |
| France | No need to eat twice as much: needs are only slightly higher. Eat twice as well, not twice as much. |
| Italy | Some nutrients are needed more, but that does not mean eating for two. |
Checked against NHS (nhs.uk), National Institute for Health and Care Excellence (NICE, and its Clinical Knowledge Summaries), nidirect (Northern Ireland), Royal College of Obstetricians and Gynaecologists (RCOG), Health Service Executive (HSE), The National Maternity Hospital, Holles Street (public maternity hospital), Bundesministerium für Gesundheit (and its portal gesund.bund.de), Netzwerk Gesund ins Leben (Bundeszentrum für Ernährung, BLE), l'Assurance Maladie (ameli.fr), Santé publique France, Manger Bouger (mangerbouger.fr), Ministère chargé de la santé (Santé.fr, le Service public d'information en santé), Istituto Superiore di Sanità (EpiCentro, ISSalute), Provincia autonoma di Bolzano, Ripartizione Salute (provincia.bz.it), checked on 13 October 2026
What the official pages say
“you do not need to "eat for 2" - even if you are expecting twins or triplets”
NHS (nhs.uk), read on 13 October 2026“In the final 3 months of your pregnancy, you'll need an extra 200 calories a day - that's the same as 2 slices of wholemeal toast and margarine.”
NHS (nhs.uk), read on 13 October 2026“reassure people that they do not need to 'eat for two'”
National Institute for Health and Care Excellence (NICE, and its Clinical Knowledge Summaries), read on 13 October 2026“During the last trimester (three months) of pregnancy, you will need to eat an extra 200 calories every day.”
nidirect (Northern Ireland), read on 13 October 2026“It is only in the last 12 weeks that they need to eat a little more, and then only an extra 200 calories a day, which is roughly the same as two slices of bread.”
Royal College of Obstetricians and Gynaecologists (RCOG), read on 13 October 2026“But you do not need to eat twice as much during pregnancy.”
Health Service Executive (HSE), read on 13 October 2026“Most women do not need extra calories during the first trimester of pregnancy.”
Health Service Executive (HSE), read on 13 October 2026“It's the quality rather than the quantity of your diet that counts.”
The National Maternity Hospital, Holles Street (public maternity hospital), read on 13 October 2026“Der Kalorienbedarf steigt nur in den letzten Monaten der Schwangerschaft leicht an.”
Bundesministerium für Gesundheit (and its portal gesund.bund.de), read on 13 October 2026“Wusstet ihr, dass der Energiebedarf werdender Mütter nur leicht ansteigt und das auch erst in den letzten Monaten der Schwangerschaft?”
Netzwerk Gesund ins Leben (Bundeszentrum für Ernährung, BLE), read on 13 October 2026“Für zwei denken, aber nicht für zwei essen”
Netzwerk Gesund ins Leben (Bundeszentrum für Ernährung, BLE), read on 13 October 2026“Inutile de manger deux fois plus car vos besoins nutritionnels ne sont que légèrement supérieurs.”
l'Assurance Maladie (ameli.fr), read on 13 October 2026“Sachez que vous n’avez pas à manger deux fois plus pendant votre grossesse.”
Santé publique France, Manger Bouger (mangerbouger.fr), read on 13 October 2026“Il ne s’agit pas de manger deux fois plus, mais deux fois mieux, de manière variée et équilibrée en choisissant les bons aliments, aux bons moments.”
Ministère chargé de la santé (Santé.fr, le Service public d'information en santé), read on 13 October 2026“In gravidanza aumenta il fabbisogno di alcuni importanti nutrienti ma questo non vuol dire che si deve mangiare per due!”
Istituto Superiore di Sanità (EpiCentro, ISSalute), read on 13 October 2026“In gravidanza non bisogna mangiare per due!”
Provincia autonoma di Bolzano, Ripartizione Salute (provincia.bz.it), read on 13 October 2026
Is it safe to diet in pregnancy?
| Country | What the official sources say |
|---|---|
| United Kingdom | Dieting to lose weight is not recommended, even if you are overweight to begin with. |
| Ireland | Do not go on a diet to lose weight, even if you are overweight. |
| Germany | Strict or low-calorie diets are not recommended. |
| France | Diets to lose weight are advised against throughout pregnancy. |
Checked against NHS (nhs.uk), National Institute for Health and Care Excellence (NICE, and its Clinical Knowledge Summaries), NHS inform (NHS 24, Scotland), Royal College of Obstetricians and Gynaecologists (RCOG), Health Service Executive (HSE), The National Maternity Hospital, Holles Street (public maternity hospital), The Rotunda Hospital, Dublin (public maternity hospital), Institut für Qualität und Wirtschaftlichkeit im Gesundheitswesen (IQWiG, gesundheitsinformation.de), Bundesinstitut für Öffentliche Gesundheit (BIÖG: infektionsschutz.de, familienplanung.de, kindergesundheit-info.de), Santé publique France, Manger Bouger (mangerbouger.fr), Ministère chargé de la santé (Santé.fr, le Service public d'information en santé), checked on 13 October 2026
What the official pages say
“But pregnancy isn't the time to go on a diet, as it may harm the health of the unborn child.”
NHS (nhs.uk), read on 13 October 2026“Advise people that intentional weight loss during pregnancy is not recommended because of potential adverse effects on the baby.”
National Institute for Health and Care Excellence (NICE, and its Clinical Knowledge Summaries), read on 13 October 2026“Dieting to lose weight in pregnancy isn’t recommended, even if you’re overweight to begin with.”
NHS inform (NHS 24, Scotland), read on 13 October 2026“Trying to lose weight by dieting during pregnancy is not recommended as it may harm the health of your baby.”
Royal College of Obstetricians and Gynaecologists (RCOG), read on 13 October 2026“Do not try to lose weight by going on a diet.”
Health Service Executive (HSE), read on 13 October 2026“‘Dieting’ to control weight during pregnancy is not recommended.”
The National Maternity Hospital, Holles Street (public maternity hospital), read on 13 October 2026“However, even if you are overweight, you should not aim to lose weight during pregnancy.”
The Rotunda Hospital, Dublin (public maternity hospital), read on 13 October 2026“Denn der Körper braucht während der Schwangerschaft ausreichend Kalorien und wichtige Nährstoffe, weshalb zum Beispiel von einer kalorienarmen Diät abgeraten wird.”
Institut für Qualität und Wirtschaftlichkeit im Gesundheitswesen (IQWiG, gesundheitsinformation.de), read on 13 October 2026“Strenge Diäten während der Schwangerschaft werden jedoch nicht empfohlen.”
“Tous les régimes pour maigrir sont contre-indiqués pendant la grossesse et également pendant l’allaitement.”
Santé publique France, Manger Bouger (mangerbouger.fr), read on 13 October 2026“Un régime amaigrissant est à proscrire durant toute la grossesse.”
Ministère chargé de la santé (Santé.fr, le Service public d'information en santé), read on 13 October 2026
When should I talk to my midwife or doctor about weight?
| Country | What the official sources say |
|---|---|
| United Kingdom | Worried about your weight: ask your midwife or GP. |
| Ireland | Worried about your weight: talk to your GP, midwife or obstetrician; they can refer you to a dietitian. |
| France | Follow your weight with the doctor or midwife who looks after you; they can give advice suited to you. |
Checked against NHS (nhs.uk), nidirect (Northern Ireland), Health Service Executive (HSE), The Rotunda Hospital, Dublin (public maternity hospital), The National Maternity Hospital, Holles Street (public maternity hospital), l'Assurance Maladie (ameli.fr), Santé publique France, Manger Bouger (mangerbouger.fr), checked on 13 October 2026
What the official pages say
“If you're concerned about your weight or any other aspect of your health while pregnant, ask your midwife or GP for advice.”
NHS (nhs.uk), read on 13 October 2026“If you are concerned about weight gain, speak to your midwife or GP.”
nidirect (Northern Ireland), read on 13 October 2026“talk with your GP, midwife or obstetrician - they may be able to support you with advice, or refer you to a dietitian or physiotherapist for extra support”
Health Service Executive (HSE), read on 13 October 2026“If you are concerned about weight gain in pregnancy please discuss this with your doctor or midwife.”
The Rotunda Hospital, Dublin (public maternity hospital), read on 13 October 2026“If you have issues with food or weight discuss them with your Midwife, and see the dietitian for advice and support.”
The National Maternity Hospital, Holles Street (public maternity hospital), read on 13 October 2026“Le mieux est de bien surveiller votre prise de poids avec le médecin ou la sage-femme qui vous suit.”
l'Assurance Maladie (ameli.fr), read on 13 October 2026“Votre médecin ou votre sage-femme peuvent vous donner des conseils adaptés à votre situation dans les deux cas suivants :”
Santé publique France, Manger Bouger (mangerbouger.fr), read on 13 October 2026
A country missing from a table: we have not yet found that line in two independent official sources there, so we do not state it (Spain, Austria, Switzerland, Portugal, Belgium and Luxembourg are being checked). Ask your midwife or doctor.
Questions parents ask
Is there a pregnancy weight gain calculator?
Not here, on purpose. Official sources give a typical range or nothing at all, the right amount depends on your weight before pregnancy, and some countries do not weigh at every visit. Your midwife or doctor is the one to ask. Syncry does not track weight either.
I was overweight before pregnancy. Should I diet now?
No. The UK’s and Ireland’s health services both say not to diet to lose weight in pregnancy, even if you are overweight to begin with. Talk to your midwife or doctor about eating well instead.
Do I need extra calories in the first months?
In the UK, no: about 200 extra calories a day only in the last three months. Ireland’s HSE says most women need no extra calories in the first trimester.
In the app
Every appointment of your pregnancy, in your Plan
Syncry follows your pregnancy week by week, together or on your own, and puts the appointments and steps your country’s health service offers in your Plan, so you know what is coming and what to ask your midwife or doctor.