Pregnant Belly Size Chart And Shape: Things You Should Know (2024)

Pregnant Belly Size Chart And Shape: Things You Should Know (1)

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The pregnant belly size chart helps to understand the growth of a baby bump. However, the size and shape of the pregnant belly may vary in each woman. Some may have a comparatively smaller belly for women in the same weeks of gestation. While a few may have larger sizes. Keeping a size chart may help you understand the growth rate of your belly and see if there is a gradual increase or decrease in size.

Read on to know the pregnant belly size chart and identify and manage related concerns.

Does The Belly Size In Pregnancy Really Matter?

The size of your pregnancy belly may not be something of concern. Your belly could be big, small, pointy, round, or high, but that still might not necessarily affect the pregnancy. Some people may try to guess the baby’s gender, health, and progress by looking at your belly, but you should not worry about what anyone other than your doctor or midwife says.

Does Your Belly Size Determine The Gender And Size Of The Baby?

The belly size and shape determine neither the size nor the gender of the baby. A large belly could be due to excess body weight or amniotic fluid, while a small belly could be due to less amniotic fluid or if it is the first pregnancy. The size of the belly has nothing to do with the gender of the baby.

Can Belly Size Accurately Indicate Your Stage of Pregnancy?

The size of the belly may not be an indication of the stage of pregnancy. The belly size during different phases of pregnancy differs from one woman to another, based on her body type and size. Regardless of the belly size, ensure that you’re maintaining a healthy weight as being overweight or underweight during pregnancy might affect the growth of the baby (1).

It is best not to compare the size of your bump with that of other pregnant women, as the belly size may depend on several factors.

What Factors Determine Your Belly Size?

The following factors might determine the size and shape of the pregnant belly:

  1. First pregnancy: If it is your first pregnancy, you may tend to have a more compact bump as the abdominal muscles have not been stretched before. The muscles that hold your baby high feel tighter and more toned. Also, the bump is likely to be smaller than it would be in your second or subsequent pregnancies.
  1. Second or subsequent pregnancy: The first pregnancy could stretch your abdominal muscles and make it quite flexible. Unless you are into fitness or you are an athlete, your muscles might not regain their original shape or tone back. So, you may notice a bigger bump than before. Again, that does not mean your baby would be bigger.
  1. Amniotic fluid volume: Throughout the pregnancy, the amniotic fluid index keeps changing. The average index of the amniotic fluid in a normal pregnancy is more during the second trimester, while it is comparatively less during the third trimester. Based on the production of this fluid, but not your baby’s size, your belly may appear small or big (2).
  1. Change in the baby’s positions: From the second trimester, the baby might become active and begin to move inside the tummy. This may alter the shape and size of your belly. For instance, your baby might sometimes move from one side to the other, changing the shape of the tummy slightly (3).

And during the last stage of pregnancy, the head generally moves down into the pelvis, making the tummy look bigger at the bottom. This means that the baby’s position may affect the belly size and shape.

  1. Mother’s height: Taller women have a longer torso, which gives more space for the baby to grow. So, while the baby grows, the belly grows upwards and not outwards. On the other hand, shorter women will have less space, and their baby will push outwards and not upwards.

Next, we give you a chart of the average belly size during pregnancy.

[ Read: Itching Belly During Pregnancy ]

Pregnancy Belly Size Chart

This chart shows the changes you may notice in your belly as the baby grows. It is an approximate chart, and the measurements and changes could vary from one woman to another (4).

Month/weekBelly size/fetal development
First month (week 1-4)
  • No change in belly size
  • The fetus is just about the size of ¼ inch
Second month (week 5-8)
  • A firm belly, not a lot of difference in the belly size
  • The fetus’ size is about one inch
Third month (week 9-13)
  • A tiny bump starts to appear at the bottom
  • The fetus is about four inches
Fourth month (week 14-17)
  • The belly grows and is noticeable
  • The fetus is about six inches
Fifth month (week 18-21)
  • The belly is pronounced; it is visible, and the shape may vary. Some are high, some low, and some bulge at the middle
  • The baby may grow to about ten inches
Sixth month (week 22-26)
  • The belly grows double the size and looks similar to a basketball
  • The baby grows to about 12 inches
Seventh month (week 27-30)
  • The baby’s growth gets slower, and the belly size may be constant or increase
  • The baby is now about 14 inches
Eighth month (week 31-35)
  • The belly size is the same, but it looks bigger
  • The baby would grow up to 18 inches
Ninth month (week 36-40)
  • The belly looks curvy and bigger
  • The baby would be about 18-20 inches

In case you do not notice the above changes, do not panic or assume something is wrong. Check with the midwife or doctor if you’re worried about the shape or size of the belly.

Common Concerns About The Pregnant Belly

Some of the common concerns that pregnant women might have about their bellies are mentioned here:

  1. Small belly: If you have a small belly and your doctor or midwife tells you it is normal, then you do not have to worry about it. One of the concerning reasons for a small belly could be oligohydramnios or low amniotic fluid. The condition may be diagnosed through an ultrasound, and the doctor could suggest a treatment based on factors such as its extent and your medical history (5).
  1. Large belly: If your belly is growing quickly, you may visit your doctor for a check-up. Usually, it could be normal due to your previous pregnancy or other factors. One of the concerning reasons for an unusually large belly could be polyhydramnios, or a high amount of amniotic fluid (6), which would be diagnosed by your doctor and handled appropriately.
  1. High belly: If you are carrying high, it usually means you have a good muscle tone and strong abdominal muscles. Also, it could be because you’re tall, and in most cases, a high pregnancy belly is considered normal unless diagnosed otherwise by your doctor or midwife. However, make sure your doctor monitors the size of the belly regularly.
  1. Low belly: With a low belly, it might seem like the baby is ready to come out any minute, but that is not normally the case. Carrying a low belly could cause discomfort, pressure on the lower back, and pelvic pain, but is not a reason for concern.
  1. Wide belly: Carrying wide usually means that the baby is in a side-to-side position, a situation termed as a transverse lie (7). It could be a problem if the baby does not turn with its head down at the time of labor. However, sometimes, an overweight pregnant woman may carry wide, which is not a reason for concern.

Your pregnancy belly lasts only as long as your pregnancy does. So, celebrate it with special activities.

Celebrating Your Pregnancy Belly

Here are some exciting ideas to make your pregnancy memorable:

1. Photoshoot:

A pregnancy photoshoot is a trend these days, and lets you capture your pregnancy belly every month and create a beautiful collage at the end.

Image: Shutterstock

2. Belly painting:

Painting something creative and beautiful on your belly is another thoughtful way to celebrate your pregnancy. You can let your husband or child do it, or get it done professionally.

Image: Shutterstock

3. Pregnancy book:

You can record anything and everything about your pregnancy. Take pictures of your pregnancy belly every month and paste them in the book. Also, you could write what you are feeling at every stage. Your baby would be happy to read it when he/she grows up.

Image: Shutterstock

Enjoy every week of your pregnancy, eat healthy foods, and follow the instructions of your doctor or midwife. Do not pay attention to the folklore surrounding the shape and size of a pregnant woman’s belly. Also, ensure that your doctor or midwife is carefully monitoring fetal growth and belly size.

[ Read: How To Calculate Pregnancy Weeks And Months Accurately ]

How was your pregnancy belly? Do share your experiences and what stories you came across about your belly in the comment section below.

References:

MomJunction's articles are written after analyzing the research works of expert authors and institutions. Our references consist of resources established by authorities in their respective fields. You can learn more about the authenticity of the information we present in our editorial policy.

1. R. Horsager-Boehrer; Worried about having a big baby? Four things to know about birth weight; UT Southwestern Medical Center (2017)
2. A. Kofinas and G. Kofinas; Differences in amniotic fluid patterns and fetal biometric parameters in third trimester pregnancies with and without diabetes; The Journal of Maternal-Fetal and Neonatal Medicine (2006)
3. Pregnancy: The Second Trimester; Johns Hopkins Medicine
4. Fetal development: Stages of growth; Cleveland Clinic
5. Amniotic Fluid Problems/Hydramnios/Oligohydramnios; Children’s Hospital of Philadelphia
6. Polyhydramnios; Lee Health
7. R. E. Jackson; Transverse presentation of the fetus; University of Nebraska Medical Center

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Pregnant Belly Size Chart And Shape: Things You Should Know (4)

Jacky Bloemraad-de Boer is a certified professional midwife, traditional Chinese medicine practitioner, doula, nutritionist and herbalist. In 2012 she began JJ Doula Training in Amsterdam and has trained more than 200 doulas. Boer has trained midwives across the globe for a three-year midwifery program that she created. She continues to teach midwifery sciences and complementary medicine for fertility, pregnancy, childbirth... more

Pregnant Belly Size Chart And Shape: Things You Should Know (5)

Shikha is a writer-turned-associate editor at MomJunction. Her core interest lies in writing articles that guide couples through their courtship to marriage and parenthood. She also specializes in baby names. Being a postgraduate in Human Resources, she likes understanding people and their relationships. This reflects in her relationship articles, where she deals with both the rosy and the grey side... more

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    Pregnant Belly Size Chart And Shape: Things You Should Know (2024)

    FAQs

    Pregnant Belly Size Chart And Shape: Things You Should Know? ›

    Pregnancy Belly Size Chart
    Month/weekBelly size/fetal development
    Eighth month (week 31-35)The belly size is the same, but it looks bigger The baby would grow up to 18 inches
    Ninth month (week 36-40)The belly looks curvy and bigger The baby would be about 18-20 inches
    7 more rows
    Jun 13, 2022

    What determines belly shape during pregnancy? ›

    Your Height

    Tall pregnant women with long torsos tend to carry in front since the baby has room to push up, while short pregnant women tend to have a belly that pushes outward and is a bit more spread out. Due to body shape and height, pregnant bellies can also create an optical illusion.

    Does size of belly matter in pregnancy? ›

    The truth is, no-one can judge the size of your baby simply by looking at your belly – not even your doctor or midwife. As your body changes at each different stage of pregnancy, you can't compare yourself with other women.

    What weeks Does your belly grow the most? ›

    For most people, this happens around weeks 12 to 16, but everyone is unique. Certain factors may impact whether your pregnant belly shows earlier or later. Those who have had a previous pregnancy tend to develop a noticeable pregnant belly earlier, due to looser muscles and ligaments.

    What does a wide pregnant belly mean? ›

    large. A big bump more likely means you have weaker abdominal muscles or a shorter stature. It can also signal a noncancerous growth in your uterus called fibroids. Because pregnancy hormones tend to make fibroids grow, they may cause you to show larger than the baby's gestational age.

    How can you tell if its a boy or girl by the belly? ›

    The theory is that women who have bellies that are prominent with extra weight in front are carrying boys while women who carry extra weight in the rear and hips are carrying girls. So, for a woman with a boy, the pregnancy belly will look different. If you have more of a round belly, a girl may be on the way.

    What determines baby bump size? ›

    Strong abdominal muscles mean a growing uterus is going to stay closer to the core of the body, Kirkham explained, making a bump appear smaller. On the other hand, if core muscles have been stretched out from a previous pregnancy, a second or third pregnancy baby bump may look larger.

    Does a small bump mean a small baby? ›

    And before you start panicking about birth weight, bump size is no indication of your baby's weight either. 'Mums-to-be are forever comparing bumps,' says Bird. 'But everyone's individual and just because someone has a big bump, it doesn't mean they'll necessarily have a big baby.

    Is it OK to press on pregnant belly? ›

    The bottom line. The vast majority of contact your belly has with the outside world every day won't hurt your baby — they're very well protected in there! The risk increases a little during the third trimester, when baby is bigger and the risk of placental abruption is higher.

    How big should a pregnant belly be? ›

    Start with the number of weeks you're pregnant, then add two to that number and also subtract two from that number, which will give you the range your belly should be within. For example, if you're 30 weeks pregnant your belly should be between 28 and 32 centimeters.

    What week does belly button pop? ›

    But sometimes a growing baby in the uterus can put so much pressure on a woman's abdominal wall that her normally “innie” belly button becomes an “outie.” It typically happens in the second or third trimester of pregnancy, most commonly around 26 weeks. If it happens to you, don't worry.

    Which side of the stomach is the baby located? ›

    A fetus might be in any of these positions: Left occiput anterior: The head is down, the fetus is facing the pregnant person's back, and they are in the left side of the womb. Right occiput anterior: The position is the same as that above, but the fetus is in the womb's right side.

    Where do you push on your stomach to feel the baby? ›

    So most fetal movement (kicks, etc.) is felt in the lower part of the belly. As both the uterus and fetus grow, a fetus' movements can be felt all over the belly, including the upper part of the abdomen. So it is completely normal to feel fetal kicks in the lower part of your abdomen prior to 20 weeks.

    Do girl and boy bumps look different? ›

    You look at the size of the bump since boys are often bigger. Newborn boys typically weigh slightly more than newborn girls. In theory, this means that a baby boy should make a bump bigger than a baby girl.

    Who kicks more in womb boy or girl? ›

    One study, published in 2001 in the journal Human Fetal and Neonatal Movement Patterns, found that boys may move around more in the womb than girls. The average number of leg movements was much higher in the boys compared to the girls at 20, 34 and 37 weeks, that study found.

    How do models stay skinny during pregnancy? ›

    After six weeks of cardio, the fitness routine should change to interval training: 20 minutes of cardio, followed by muscle work of 16 to 20 reps light weightlifting, then switching back and forth between cardio and weightlifting for the duration of the workout," he said.

    What does the black line on a pregnant woman mean? ›

    Also called the pregnancy line, it shows up in most pregnancies, but is more noticeable in women with dark skin or hair. The linea nigra appears because of high levels of hormones like estrogen and progesterone during pregnancy, which can make some areas of the skin look darker.

    Does what you eat affect the size of your baby? ›

    A woman's diet in early life has more impact on her baby's birth weight than the food she eats as an adult, researchers say. The surprise finding suggests that you are what your mother ate, and that a woman's diet in her adult life has less influence on her baby's health than previously thought.

    How do I know if I'm having a big baby? ›

    Signs and symptoms include: Large fundal height. During prenatal visits, your health care provider might measure your fundal height — the distance from the top of your uterus to your pubic bone. A larger than expected fundal height could be a sign of fetal macrosomia.

    Does bump size matter? ›

    Like babies, bumps come in all shapes and sizes. A first pregnancy can be smaller and tidier than a second but this isn't always the case. Bump size depends (obviously) on how many babies you're carrying and (less obviously) which way your baby is lying and the amount of amniotic fluid in the womb.

    Why is my pregnant belly sometimes hard and sometimes soft? ›

    What nobody tells you is how it will feel as it expands, and how that feeling can change over time. Depending on your stage of pregnancy, your body type, and even the time of day, sometimes your belly will feel soft and other times it will feel tight and hard. The reality is, there's no normal to compare yourself with.

    What causes small baby? ›

    Who is at risk for being small for gestational age? When the unborn baby doesn't get enough oxygen or nutrients during pregnancy, the baby's body and organs don't grow as much as they should. Some of the problems that cause babies to be small for gestational age limit how much blood flows through the placenta.

    Why isnt my pregnant belly round? ›

    Remember that your belly shape can change as your pregnancy progresses. From the first to the third trimester all bellies develop through different shapes and sizes. Some women report that as weight shifted and adjusted during their pregnancy the “B” shape became less obvious or even transformed into a “D” shape.

    Does baby like when I rub my belly? ›

    The results? The babies moved their arms, heads and mouths more when their mothers touched their bellies than when their moms spoke to them. They also responded to maternal touch earlier in gestation than was previously known, between weeks 21 and 25 of pregnancy.

    How long can I lie on my back while pregnant? ›

    Bump-friendly sleep positions

    The safest position to go to sleep is on your side, either left or right. Research suggests that, after 28 weeks, falling asleep on your back can double the risk of stillbirth. This may be to do with the flow of blood and oxygen to the baby.

    Can I lay on my back for an hour while pregnant? ›

    Dr. Zanotti reassures expectant mothers not to stress if they accidentally find themselves on their backs for a brief spell. “We do know that short periods of time ―even if you were on your back for an hour or two ― probably do no harm to your child,” she says.

    How accurate are belly measurements in pregnancy? ›

    Measuring bigger or smaller than the average is usually perfectly normal. In fact, research suggests fundal height measurements are often off by two weeks in non-obese women. There's always a margin of error when it comes to estimating the exact weight and size of an unborn baby.

    Why shouldn't you play with your navel? ›

    There are many risks associated with playing with your navel, but one of the most important is that you can push on your bellybutton and cause an infection. What is this? This happens when you introduce bacteria into your body through a wound in the area.

    Is the mother's belly button connected to the baby? ›

    As you can see, it is not attached to anything in the body. The belly button is where the umbilical cord attaches to the fetus, connecting the developing baby to the placenta.

    Why is my pregnant belly bigger at night? ›

    "This is generally due to the fact that her abdominal muscles, which hold the baby bump, have loosened and relaxed throughout the day, allowing the bump to 'push' further out and appear larger.

    Does baby sleep in womb when mother sleeps? ›

    Sensation. After around 18 weeks, babies like to sleep in the womb while their mother is awake, since movement can rock them to sleep.

    What will happen if I sleep on my right side while pregnant? ›

    Many physicians advise pregnant women to sleep on their left side. Previous studies have linked back and right-side sleeping with a higher risk of stillbirth, reduced fetal growth, low birth weight, and preeclampsia, a life-threatening high blood pressure disorder that affects the mother.

    Is it OK to sleep on your right side pregnant? ›

    Right now, side sleeping is safest for your baby. Plus, it's more comfortable for you as your abdomen grows. Is one side of the body better than the other for sleeping? Experts recommend lying on your left side.

    Can drinking cold water affect my unborn baby? ›

    It is absolutely safe. Pregnancy is an extension of the physiological body and not any sickness. So, all that your body was used to or capable of doing before the pregnancy, can be done during pregnancy too. So, if you were drinking cold water or juice before pregnancy you can continue doing so.

    What can I eat to make my baby move? ›

    Next time you're trying to do a kick count or just want reassurance that your little one is okay, try eating a healthy snack like cheese and crackers, peanut butter toast, Greek yogurt or fruit and nuts. For an extra jolt, add a small glass of (natural) juice.

    When should you start reading to your baby in the womb? ›

    At 27 to 29 weeks (6 to 7 months), they can hear some sounds outside your body too, like your voice. By the time they are full term, they will be able to hear at about the same level as an adult. In other words, this is a great time to start reading and singing to them.

    Can you hear a baby cry in the womb? ›

    While it's true your baby can cry in the womb, it doesn't make a sound, and it's not something to worry about. The baby's practice cries include imitating the breathing pattern, facial expression, and mouth movements of a baby crying outside of the womb.

    Which baby kicks more at night? ›

    Most of the pregnant woman observe more movement during night time. This can be due to your baby becoming more alert during the night when he or she is not feeling any activity. During the day time, pregnant women are more active because of which the baby may go into its sleeping mode.

    Which pregnancy is harder boy or girl? ›

    Compared to girls, boys had 27 percent higher odds of preterm birth between 20 and 24 weeks' gestation; 24 percent greater risk for birth between 30 and 33 weeks; and 17 percent higher odds for delivery at 34 to 36 weeks, the study found.

    Can you get in better shape while pregnant? ›

    Yes — the sooner, the better, to give you time to get the benefit of your exercises. Being as fit as you can during your pregnancy can also help you recover after you give birth and will ease some of the aches and pains of your constantly changing body. You may have to adjust your exercise.

    Can I lose fat while pregnant? ›

    Unless you're in early pregnancy, it's not safe to lose weight while pregnant. Your body is working hard to support your growing baby, and if you're losing weight or dieting while pregnant, you may miss out on important nutrients you need for a healthy pregnancy.

    How can I avoid getting fat during pregnancy? ›

    What if I am gaining too much weight?
    1. Eat the appropriate portion size and avoid second helpings.
    2. Choose low-fat dairy products.
    3. Exercise; consider walking or swimming on most if not all days.
    4. Use low-fat cooking methods.
    5. Limit sweets and high-calorie snacks.
    6. Limit sweet and sugary drinks.
    Jan 1, 2018

    What's the difference between a girl bump and boy bump? ›

    You look at the size of the bump since boys are often bigger. Newborn boys typically weigh slightly more than newborn girls. In theory, this means that a baby boy should make a bump bigger than a baby girl.

    Why is my pregnant belly bigger than others? ›

    If you're expecting your second or subsequent baby, you may also tend to have a larger bump. This is probably because your tummy muscles have been stretched by previous pregnancies. Being overweight, or gaining a lot of weight during pregnancy, may also make your bump look bigger.

    What determines how you carry a baby? ›

    The position of the baby, the size and shape of the uterus, and the strength of the abdominal muscles (they tend to lose strength in subsequent pregnancies) can all determine if a pregnancy will be carried, high, low, out front, or all over.

    Is it normal to have a small belly during pregnancy? ›

    Yes, it's most likely normal to have a small baby bump. You may feel like you don't look pregnant yet, even if you're already into your second trimester, but it's important to know that there isn't a specific time when moms-to-be are supposed to start showing. Every pregnant body is different.

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