20 Weeks Pregnant: Week-by-Week Guide
20 Weeks Pregnant

20 Weeks Pregnant: Week-by-Week Guide

Congratulations! You are 20 weeks pregnant — right at the halfway mark. At this stage of your journey, new developments are beginning to unfold — like learning if you’re having a little boy or a girl. Explore our week-by-week guide to find out what’s in store for your baby and your body in week 20 of pregnancy.

At 20 weeks pregnant:

  • Your baby is the size of a sweet potato
  • You’re officially at the halfway mark.
  • The countdown continues: you’ve got 20 weeks to go!

What happens during the 20th week of pregnancy?

  • It’s a… — with baby’s sex organs formed, the second-trimester ultrasound will tell you the gender of your little creation.
  • Belly button movement — if you had an innie belly button, by now, it’s becoming an outie on your rapidly expanding belly.
  • Mind-expanding — with all the billions of neurons growing, your baby’s brain is taking shape, with the grooves and folds adding precious surface area to hold all those brain cells.

What should I be feeling at 20 weeks pregnant?

  • You will be feeling all kinds of things at this time, including, potentially, those first little kicks.
  • All that growth may be putting some pressure on your lungs, bladder, stomach, and kidneys.
  • With your baby now growing rapidly (and your tummy), you’ll be able to try on some of that cute maternity wear.

20 Weeks Pregnant Facts

How big is your baby? Check out the chart below to find out!

Baby Size at 20 Weeks
Baby Weight 10 ounces
Baby Length 6.5 inches
Baby Size Comparable to a sweet potato or a banana

Week 20 Pregnancy Symptoms

During week 20 of pregnancy, your body is adjusting to the new life it’s supporting. As your baby changes, you will too, and there are certain pregnancy symptoms you may experience at this time. Keep these week 20 pregnancy symptoms on your radar:

  • Your hair and nails may be experiencing a growth spurt of their own, due again to the wonders that are pregnancy hormones.
  • The second trimester is smooth sailing for morning sickness, but that doesn’t mean you won’t struggle with indigestion and heartburn.
  • Swelling and edema are common at this point
  • With the expanding uterus, it can push up against your lungs, making you feel short of breath.
  • Your sleep may be getting disturbed. A few basic changes can help.


Being 20 weeks pregnant is an important time for you and your baby. Get advice on how to adjust to this new stage.

  • Your iron supply is probably depleted now. As anemia is common when pregnant, you should switch up your diet with iron-rich food or consider taking a supplement.
  • If you haven’t had it yet, the mid-pregnancy check-up will allow your OB to check that everything is in order – and if you want to know, it can reveal your child’s gender.
  • Twenty weeks pregnant is an excellent time to start interviewing pediatricians. Ask friends, family, and coworkers for referrals. Then set up consultation appointments. Some topics to cover: the office’s hours of operation, hospital affiliation, and resources for new parents. For more questions to consider asking, check out “Finding a Pediatrician.”

Week 20 Checklist: Plan Your Pregnancy

Be prepared. Explore our pregnancy checklist below and add these items to your to-do list this week.

To-Do Complete
Schedule your first prenatal appointment (example)
Start interviewing pediatricians
Decorate the nursery

Learn more about the role DHA plays in your baby’s development, or read our second trimester tips.