Prolactin is the queen hormone responsible for producing your boob juice and it doesn't just make milk. It can also increase your appetite and actually slow down fat metabolism. This means that – not only is your body saying “Eat all the things!” – it's also saying “Store all the fat!”
In a 2004 study in The American Journal of Clinical Nutrition, researchers actually found that lactating women retained more weight than non-lactating women, presumably “due to the influence of prolactin on appetite stimulation.”
That may sound extreme, but nearly every mom who's ever exclusively breastfed her baby can agree that breastfeeding is a workout and makes you HUNGRY, since the body needs to replenish the calories it burns producing milk (about 20 calories per ounce).
However both groups lost weight at similar rates and decreases in body weight was not influenced by breastfeeding. All mothers lost some fat in their trunk (chest, stomach, and pelvic region), but it was the rate of fat loss that differed. The breastfeeding moms may have also consumed more calories.
Your Hormones
Prolactin is the hormone that tells your body to make milk (2). It will also increase your appetite. This increase may cause you to eat more calories than you need for milk production. Those extra calories could cause you to gain weight instead of losing it.
Therefore, breastfeeding mothers who gained the recommended 25–35 pounds (11.5–16 kg) during pregnancy should be able to lose this weight within the first 6–8 months postpartum ( 13 ). However, many nursing mothers take longer than this interval to shed their baby weight.
Five reasons it's hard to lose weight after baby
Once the initial weight is lost, you'll need more time to lose the other pounds gained: "You will lose water weight and baby, amniotic fluid and placenta weight quickly, but losing fat pounds takes time and commitment."
It takes time to build feeding interest and volume, which is why weight loss is often seen in the first few weeks following the initiation of a weaning protocol. Weight loss of up to ten percent of the child's body weight is considered acceptable by industry standards.
The U.S. Dietary Guidelines for Americans 2020-2025 [PDF-30.6MB] recommend that infants be exclusively breastfed for about the first 6 months with continued breastfeeding while introducing appropriate complementary foods for 1 year or longer.
Overall maternal adaptations during lactation include increased basal metabolic rates and mobilization of fat stores [22–24]. Maternal fuel metabolism is altered markedly, with a 15 %–25 % increase in energy expenditure for milk production [24, 25].
Women who breastfed exclusively for at least 3 months had a 1.3-pound (0.59 kg) (95% CI: 0.2,2.5 pounds, p<0.05) greater weight loss at 6 months postpartum, relative to those who did not breastfed or breastfed non-exclusively.
Yes, lemon water is considered “safe to drink” when breastfeeding. It is most commonly recommended to stay hydrated and keep digestive issues, such as bloating, at bay (1). When breastfeeding, this healthy drink could add variety to your daily water intake.
An additional 330 to 400 kilocalories (kcal) per day is recommended for well-nourished breastfeeding mothers, compared with the amount they were consuming before pregnancy (approximately 2,000 to 2,800 kcal per day for breastfeeding women verses 1,600 to 2,400 kcal per day for moderately active, non-pregnant women who ...
For example, if you breastfeed three times per day and produce 5 ounces of milk during each feeding, you are producing 15 ounces of milk per day. When producing 15 ounces of milk per day, you will burn an estimated 396 calories per day.
Additionally, research has shown that breastfeeding can support your postpartum weight loss. However, in the first 3 months of breastfeeding, you may experience no weight loss or even some weight gain. This is due to increased calorie needs and intake, as well as reduced physical activity during lactation.
You may be losing weight and gaining muscle
If you're losing inches but maintaining your weight and you regularly strength train, you may actually be losing fat and gaining muscle. The process of gaining muscle and losing fat at the same time is called body recomposition.
Postpartum weight gain can happen for a number of reasons, from the fact that you're fatigued or don't have time for a regular excercise routine, or because of an underlying health condition that requires attention, such as postpartum thyroiditis, diabetes, or PCOS (polycystic ovary syndrome).
That said, it's not a guarantee that you'll gain weight after you stop nursing. “Some women actually lose weight after weaning,” Cording says. It's worth checking in with yourself if you're concerned about your overall health or feel like your eating habits haven't been the best lately.
When can I start losing weight? It is recommended that you wait at least 6-8 weeks postpartum to start to lose weight, as your body needs this time to recover from childbirth and establish a good milk supply. Many mothers lose weight in the early months by following a well-balanced diet and eating to hunger.
You should plan to return to your pre-pregnancy weight by 6 to 12 months after delivery. Most women lose half of their baby weight by 6 weeks after childbirth (postpartum). The rest most often comes off over the next several months. A healthy diet with daily exercise will help you shed the pounds.
Milk production – You'll burn more calories with an overabundant breastmilk supply than if you have a low milk supply. Your baby's age – You'll be breastfeeding less frequently when you start weaning as your baby begins eating solid foods.
The extra fluid that built up in your body during pregnancy will gradually decrease, reducing swelling and bloating . And any extra fat you put on to nourish your baby will start to burn off, especially if you're breastfeeding and exercising . But it takes at least a few weeks to see noticeable results.