Your breast growth in pregnancy might predict your baby's sex

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Yep. You're not imagining it. Your boobs are bigger when you have a boy. And evidence backs that up. Sometimes changes in your boobs can be the first sign that you are pregnant. It seems like even looking at your boobs can make them hurt, and they often get firmer than we're used to. Hormones start working fast when you get pregnant—especially on your breasts in preparation for breastfeeding. Fatty tissue grows and blood flow increases to help the milk ducts and mammary glands grow. According to the March of Dimes, by the time you are about six weeks pregnant, your breasts can grow a full cup size or more, and on average, by your ninth month, you gain two pounds just in your boobs Changes in your boobs can tell you more than just if you are pregnant—they can tell you if you are having a boy or a girl. In a small study published in the American Journal of Biology, ninety-three women were recruited to participate in a three-stage longitudinal study. They received 3D breast scans to calculate their breast volume at the 12th, 22nd and 32nd week of their pregnancy. The values were compared between women who were having a boy and those who carried a girl. Results indicated that a greater increase in breast size—not just size alone—predicted that a mother was more likely to be having a boy. This same study revealed that if your boobs were asymmetrical before your pregnancy (like 88% of us), they are likely to even out with pregnancy, but that symmetry has no bearing on whether you are pregnant with a boy or a girl. There's even more fascinating science about boy babies and breastfeeding. In a study of 8556 babies, it was discovered that at birth, boys were on average 7 ounces heavier than girls, possibly requiring different nutritional needs for breastfeeding. Breast milk quality can affect your baby's health, growth and development, so researchers set out to quantify nutrient and energy content. In a small study, breast milk from twenty-five healthy, well‐nourished women with babies aged 2- to 5-months was analyzed. Potential sources of variation in breast milk quality, like feeding patterns, infant sex and the mother's breast growth during pregnancy, were considered. After controlling for time since the last feeding (since breast milk composition changes throughout the day) researchers found that mothers of boys produced milk that had 25% greater energy content than mamas of girls. Another analysis of 500 samples of breast milk from 61 mothers over 12 months echoed these findings by revealing that breast milk has more fat when you have a boy. 77 mothers at 4- to 8-weeks postpartum provided breast milk samples that were analyzed for their composition. It was determined that breast milk from mothers of boys had a higher carbohydrate content. This also found that participants' pre-pregnancy and current nutritional status affected the composition of their breast milk. This suggests that what is in the breast milk you make could be determined during your pregnancy. The study authors wrote that breast milk "may have [a] unique compositional profile for every mother-infant dyad." So even before they are born, and no matter if they are a boy or a girl, your baby already may be telling you exactly what they need. Amazing. Products that support you as you fuel your child with milk. Nunona Chocolate Chunk Mama BallsThese energy balls were created to support your nutritional needs as you make super-nutritious breast milk. The box contains a one-week supply that makes nourishing your body a breeze—and totally delicious, too.Earth Mama Organic Nipple ButterEarth Mama's Organic Nipple Butter is a fan favorite for a reason. It's free of petroleum, parabens and lanolin, and applies like a dream, working quickly to soothe your sore and raw nipples. You can check out our midwife's glowing review here!Willow Hands-Free Breast PumpIs the Willow pump worth it? In a word, yes. (Check out our review here!) The wearable electric pump allows you to pump untethered and in comfort—it might even help you pump more milk, as users saw a 20% increase in volume!We independently select and share the products we love—and may receive a commission if you choose to buy. You've got this.Nunona Chocolate Chunk Mama BallsThese energy balls were created to support your nutritional needs as you make super-nutritious breast milk. The box contains a one-week supply that makes nourishing your body a breeze—and totally delicious, too.Earth Mama Organic Nipple ButterEarth Mama's Organic Nipple Butter is a fan favorite for a reason. It's free of petroleum, parabens and lanolin, and applies like a dream, working quickly to soothe your sore and raw nipples. You can check out our midwife's glowing review here!Willow Hands-Free Breast PumpIs the Willow pump worth it? In a word, yes. (Check out our review here!) The wearable electric pump allows you to pump untethered and in comfort—it might even help you pump more milk, as users saw a 20% increase in volume!
Yep. You're not imagining it. Your boobs are bigger when you have a boy. And evidence backs that up. Sometimes changes in your boobs can be the first sign that you are pregnant. It seems like even looking at your boobs can make them hurt, and they often get firmer than we're used to. Hormones start working fast when you get pregnant—especially on your breasts in preparation for breastfeeding. Fatty tissue grows and blood flow increases to help the milk ducts and mammary glands grow. According to the March of Dimes, by the time you are about six weeks pregnant, your breasts can grow a full cup size or more, and on average, by your ninth month, you gain two pounds just in your boobs Changes in your boobs can tell you more than just if you are pregnant—they can tell you if you are having a boy or a girl. In a small study published in the American Journal of Biology, ninety-three women were recruited to participate in a three-stage longitudinal study. They received 3D breast scans to calculate their breast volume at the 12th, 22nd and 32nd week of their pregnancy. The values were compared between women who were having a boy and those who carried a girl. Results indicated that a greater increase in breast size—not just size alone—predicted that a mother was more likely to be having a boy. This same study revealed that if your boobs were asymmetrical before your pregnancy (like 88% of us), they are likely to even out with pregnancy, but that symmetry has no bearing on whether you are pregnant with a boy or a girl. There's even more fascinating science about boy babies and breastfeeding. In a study of 8556 babies, it was discovered that at birth, boys were on average 7 ounces heavier than girls, possibly requiring different nutritional needs for breastfeeding. Breast milk quality can affect your baby's health, growth and development, so researchers set out to quantify nutrient and energy content. In a small study, breast milk from twenty-five healthy, well‐nourished women with babies aged 2- to 5-months was analyzed. Potential sources of variation in breast milk quality, like feeding patterns, infant sex and the mother's breast growth during pregnancy, were considered. After controlling for time since the last feeding (since breast milk composition changes throughout the day) researchers found that mothers of boys produced milk that had 25% greater energy content than mamas of girls. Another analysis of 500 samples of breast milk from 61 mothers over 12 months echoed these findings by revealing that breast milk has more fat when you have a boy. 77 mothers at 4- to 8-weeks postpartum provided breast milk samples that were analyzed for their composition. It was determined that breast milk from mothers of boys had a higher carbohydrate content. This also found that participants' pre-pregnancy and current nutritional status affected the composition of their breast milk. This suggests that what is in the breast milk you make could be determined during your pregnancy. The study authors wrote that breast milk may have [a] unique compositional profile for every mother-infant dyad. So even before they are born, and no matter if they are a boy or a girl, your baby already may be telling you exactly what they need. Amazing. Products that support you as you fuel your child with milk. Nunona Chocolate Chunk Mama BallsThese energy balls were created to support your nutritional needs as you make super-nutritious breast milk. The box contains a one-week supply that makes nourishing your body a breeze—and totally delicious, too.Earth Mama Organic Nipple ButterEarth Mama's Organic Nipple Butter is a fan favorite for a reason. It's free of petroleum, parabens and lanolin, and applies like a dream, working quickly to soothe your sore and raw nipples. You can check out our midwife's glowing review here!Willow Hands-Free Breast PumpIs the Willow pump worth it? In a word, yes. (Check out our review here!) The wearable electric pump allows you to pump untethered and in comfort—it might even help you pump more milk, as users saw a 20% increase in volume!We independently select and share the products we love—and may receive a commission if you choose to buy. You've got this.Nunona Chocolate Chunk Mama BallsThese energy balls were created to support your nutritional needs as you make super-nutritious breast milk. The box contains a one-week supply that makes nourishing your body a breeze—and totally delicious, too.Earth Mama Organic Nipple ButterEarth Mama's Organic Nipple Butter is a fan favorite for a reason. It's free of petroleum, parabens and lanolin, and applies like a dream, working quickly to soothe your sore and raw nipples. You can check out our midwife's glowing review here!Willow Hands-Free Breast PumpIs the Willow pump worth it? In a word, yes. (Check out our review here!) The wearable electric pump allows you to pump untethered and in comfort—it might even help you pump more milk, as users saw a 20% increase in volume!
Yep. You're not imagining it. Your boobs are bigger when you have a boy. And evidence backs that up. Sometimes changes in your boobs can be the first sign