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La prise de poids de votre bébé allaité

Your breastfed baby's weight gain

The weight of breastfed babies is a source of concern for many mothers, and even more so when it is a first breastfeeding experience. We've looked into weight gain in breastfed babies to put your mind at ease!

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Is my milk nutritious enough? Do I have enough milk? Is my baby gaining enough weight, or too much? We've looked into weight gain in breastfed babies: what's normal, and when to seek advice!

The weight of breastfed babies is a source of concern for many mothers, even more so when it's a first breastfeeding experience.


Unlike bottle feeding, where you can "see" what you're giving the baby and how much they take, breastfeeding is more of a "black box".

Sans des repères connus et directement visibles, beaucoup de mamans ont peur de ne pas pouvoir allaiter exclusivement, ce qui peut compromettre l'allaitement au quotidien.

Did you know?

Les courbes de croissance des carnets de santé en France ne sont pas adaptées pour évaluer la prise de poids des bébés allaités.

Weight gain in the breastfed baby: what you need to know at birth and in the first few days?

Sauf cas très rares (anomalie ou lésion de la glande mammaire, médicament, pilule contraceptive, problème hormonal) nous pouvons toutes allaiter et nous avons toutes assez de lait pour notre enfant. On vous rassure donc tout de suite sur ce point.

 Vous n’avez besoin de rien d’autre à la naissance de votre enfant, que vos seins, votre bébé, et de rester “à la même adresse” collé-serré. Bébé va dormir joue contre le sein, et pouvoir téter à la demande, aussi fréquemment que nécessaire. Le contact étroit avec son bébé va également aider à prendre confiance en vous et en vos capacités d’allaitement. Être tout prêt de lui va vous aider à mieux comprendre ses besoins, sans avoir besoin de savoir “combien” il prend. Bref, laissez-vous guider par votre instinct et par votre bébé ! 

Pas besoin de tirer votre lait non plus durant les premières semaines, sauf cas particuliers (besoin de supplémentation temporaires, bébé prématuré et hospitalisé..). Vous n'avez pas besoin non plus de prendre systématiquement un complément post partum à base de galactogènes pour soutenir votre lactation.

In all babies, weight loss after birth is completely normal and physiological. It is mainly a loss of water. Weight loss can be up to 10% between birth and the eighth day.

Colostrum is rich in immunoglobulins and is simply perfect for feeding your baby until your milk comes in, both in quantity and quality. There's no need to worry about your milk coming in. Simply start breastfeeding from birth, with skin-to-skin contact, to get things off to a good start.

At birth, a baby's stomach is the size of a small marble (5ml). It grows 11 times larger in size over the first 10 days of life! 

The baby needs to feed frequently. The colostrum produced in the first few days (between 35 and 50 ml) is therefore more than sufficient to meet its needs!

After birth, the brain needs a continuous source of fuel, especially during the first three months, during which it achieves 25% of its growth. The baby must therefore continually fill its little stomach to fuel its big brain.

Put baby to the breast as often as possible. It is perfectly normal for a baby to feed between 8 and 12 times in 24 hours, or even much more. Weight gain is generally directly proportional to the number of feeds and their effectiveness.

It is important to breastfeed on demand, or at the first signs of waking. Do not wait for baby to cry before putting them to the breast, as it becomes more difficult than when they are calm. You can also feed them while they are in a light sleep phase (characterised, for example, by eye and eyelid movement).

Night feeds account for a significant proportion of milk consumed over 24 hours

Expecting him to sleep through the night straight away is therefore unrealistic, as is wanting to "manage" this by spacing out and reducing feeds. This can lead to insufficient weight gain and poor establishment of breastfeeding.

Please note: Some babies will do nothing but sleep, without asking to feed. They may seem like an easy baby, when in fact they are not getting enough nourishment. Be careful not to be misled by the idea of a "normal" baby who sleeps through the night and feeds at regular times, just 3 or 4 times a day at most!

Do not hesitate to seek help from an IBCLC lactation consultant to assess a full feed and, if necessary, review your breastfeeding management!

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Weight loss in breastfed babies: what is normal?

During the first month of life, if milk transfer is going well, a breastfed baby will:

- Wet between 6 and 8 nappies per day (urine is plentiful and clear).

- Have 3 stools in 24 hours, up to 8 per day, decreasing towards the end of the first month (from 6 per day to 1 per week).

- After the passing of meconium around day 5, stools are liquid and lumpy, and their colour can range from golden yellow to greenish brown. Stools are on average about the size of the baby's palm.

- Birth weight is normally regained between 4 and 8 days of life (by 10 days at the latest).

Take care mama

Chaque bébé est différent, et chaque prise de poids également. N’hésitez pas à vous faire accompagner par une consultante en lactation pour suivre le poids de votre bébé. 

Weight gain in the breastfed baby: what are the signs of an effective feed?

Signs of an effective feed

- The baby feeds actively and makes sounds when swallowing

- Urine and stools are sufficient

- Finally, they are alert and awake: they make eye contact from the first month and actively seek the breast when they wake up

Bioavailability of breast milk

Due to the high bioavailability of breast milk, almost all nutrients are absorbed and used, and stools may become less frequent after the first month (once a week in some breastfed babies).

For equal growth, breastfed babies consume 20% less milk than formula-fed babies.

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Weight gain in the breastfed baby: what should raise concern?

A detailed assessment is generally necessary in the following cases:

- Weight loss in the first days exceeds 7 to 10% of birth weight

- The mother has not had a significant milk let-down by day 3–4

- The baby continues to lose weight at day 4 or is not gaining weight by day 5

- The baby has fewer than 3 stools per day, or still has meconium stools at day 7

- The baby has not yet regained their birth weight by day 15

But also if:

- The baby feeds fewer than 8 times per day

- The baby regularly sleeps for more than 3 or 4 consecutive hours

- Weight gain is less than 15 g per day between 2 weeks and 3 months

Do be careful not to panic, however — all children are different. The presence of one of the signals above does not necessarily mean there is a problem.

If a break in the weight curve is observed, the baby's condition and feeding technique should be assessed.

Boosting your milk supply: The essential guide by an IBCLC

A complete ebook designed for all mothers who want to optimise their milk supply.
Clear your doubts, explore natural strategies and adopt effective practices for a peaceful breastfeeding journey.

Your breastfed baby's weight gain

Weight loss in breastfed babies: how to respond?

If in doubt, seek support from an IBCLC straight away — she will carry out a full assessment by observing a complete feed. The sooner the issue is addressed, the better the chances of breastfeeding getting back on track. Don't wait!

If the baby's condition is satisfactory, supplementation is not necessarily required.

- Increase the frequency and duration of feeds,

- You can also practise "super-switching" (frequently alternating baby between breasts to prevent them from falling asleep on one breast — be careful not to do this in all situations, particularly if the baby is too weak, has lost too much weight or is struggling to feed, in which case it is preferable to leave them on one breast for longer),

- You can also compress the breast during a feed,

- And to express milk between feeds to stimulate production.

If weight gain resumes after 3–4 days, you can then stop expressing milk.

If necessary, the breastfeeding consultant may suggest temporary supplementation, using expressed breast milk where possible, and with a supplemental nursing system (SNS), or a cup.

Et si vous ressentez une baisse de la lactation, faites-vous accompagner par une consultante IBCLC qui pourra vous recommander au besoin un complément alimentaire allaitement à base de galactogène. 

What about the weight charts in the health record booklet?

The growth charts in French health records have recently been updated to allow weight gain to be assessed for all infants.
They are close to the curves published by the WHO in 2006, which can be downloaded from the WHO website and which are somewhat more generous, in the sense that a baby may exceed the health record curve whilst still falling within the WHO curves.

The WHO weight gain charts for babies are higher during the first 6 months than those observed in France. A weight gain considered normal according to French criteria may therefore be deemed insufficient according to the WHO study.

For high-weight baby boys, French data coincides with WHO growth charts for the second year of life. 

For baby girls, however, French data is higher than WHO data. This can raise concerns about insufficient weight gain according to traditional criteria, which may lead to an accelerated introduction of solid foods.

In the WHO study, mothers breastfed on average between 8 and 12 times in 24 hours, with many night feeds. At 3 months, the average was still 10 times, 9 times at 6 months and no fewer than 5 times at 12 months!

A breastfed baby may therefore be well above the curves in the health record book, whilst still following the WHO curve normally. We do not put the baby on a diet by spacing out feeds. A baby who is exclusively breastfed on demand is never too big!

What other criteria should be taken into account?

It is also important to take into account increases in height and head circumference.

There is also great variation between children in terms of growth. Some babies grow very quickly, then slow down. Others grow more slowly but more steadily.

If in doubt, don't hesitate to consult a paediatrician familiar with breastfed babies, and seek support from an IBCLC.

What is the effect of breastfeeding on the risk of overweight and obesity?

As the French Society of Paediatrics noted in its 2005 report: "The existence of a preventive effect of breastfeeding against subsequent obesity is now considered likely, at least through childhood and adolescence."

This preventive effect is all the more significant when a child has been breastfed for a long time, well beyond the introduction of solid foods. 

A review combined various scientific studies to examine the impact of breastfeeding on the risk of developing diabetes and obesity [1]. 

They found that among the 11 high-quality studies, the association between breastfeeding and overweight/obesitywas weaker, with a 13% reduction in risk. 

For type 2 diabetes, the risk was lower in individuals who had been breastfed (35% reduction in risk).

However, one explanation for this correlation may be related to the development of different gut bacteria. Breastfed babies have higher levels of beneficial gut bacteria, which may affect fat storage [2].

Attention toutefois, ces données sont observationnelles et mettent simplement en évidence une corrélation entre ces facteurs. 

Pour en savoir plus, consulter notre article sur les bienfaits de l'allaitement.

In conclusion

On se fait confiance, on garde bébé à la “bonne adresse” et on n’hésite pas à consulter au plus vite un IBCLC en cas de doute sur la prise de poids de son bébé. Plus un problème est pris tôt, plus il sera facile à corriger !

Dans un autre thème, retrouvez notre article sur allaitement et perte de poids

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