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It's What's Inside That Counts: What You Need to Know About Your Bump Size

For every mama-to-be, the journey of pregnancy is a whirlwind of emotions and experiences. One of the most prominent concerns, and a topic of endless conversation (from both you and the world), is the ever-growing baby bump. But here's the secret: there's no perfect size for your bump! While it's a beautiful symbol of the tiny miracle growing inside, it doesn't always tell the whole story of your baby's development. In this case, size doesn't matter😉


So, how do we know our little one is thriving?


While the bump may be a source of fascination, there are more reliable ways to assess your baby's growth. Enter the symphysis fundal height (SFH), a valuable tool your doctor uses to monitor your baby's progress.


symphysis fundal height

Fundal Height: Your Personalized Growth Tracker

Think of the fundal height as a measurement from the top of your uterus (fundus) to the pubic bone. This distance, measured in centimeters, roughly corresponds to the number of weeks you've been pregnant. For instance, if you are 28 weeks, the normal range of SFH measurement is 26-30 centimeters. It's important to understand that fundal height isn't an exact science, but a helpful indicator.


Here's what you need to know:


  • The measuring starts around 24 weeks: Before this, your growing uterus stays tucked within the pelvis, making the measurement less effective.

  • There's a buffer zone: A 2 cm difference (either way) from the expected measurement for your gestational age is considered normal.

  • Customization is key: Your doctor will plot your SFH on a personalized growth chart that factors in your height, pre-pregnancy weight, ethnicity, and if it's your first pregnancy (parity). These details can influence your overall bump size.

  • When to take action: If your initial SFH measurement falls below the 10th percentile on your customized chart, or if serial measurements show a slowing of growth, your doctor might recommend a fetal growth scan. (You can get this at your doctor’s office or at Bella 3D Imaging)This painless ultrasound provides a more precise picture of your baby's size and development. 

measuring belly with baby

The fact of the matter is, every pregnancy is unique. For some mamas, the bump might appear as early as the second trimester, while others might not notice it prominently until later on. It all depends on various factors, including your starting physique, muscle tone, and even the position of your baby. Some mothers may grow more of a bump than others. This isn’t a testament to your baby’s development. 


Remember, the focus shouldn't be on how big your bump is, but on the incredible life growing within you. Trust your doctor's expertise and the tools they use to monitor your baby's well-being. Here are some additional tips to reduce some overthinking about this topic:

  • Prenatal appointments: Don't miss these vital check-ups – they're the best way to track your baby's growth and address any concerns you might have.

  • Healthy choices: Eat a balanced diet, get enough sleep, and stay active (as advised by your doctor). These habits contribute to a healthy pregnancy and fetal development.

  • Positive affirmations: Surround yourself with love and support. Focus on the amazing transformation happening within you.



measuring pregnant belly

Embrace your unique journey, mama! Your baby's growth is being expertly monitored, and your bump is just a part of your incredible story. Remember, be proud and Bump It Out!





pregnancy belly bump
Affiliated With Bella 3D Imaging & Coaching


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