What To Expect In Your Second Trimester Of Pregnancy

woman in second trimester of pregnancy holding an ultrasound picture

With the morning sickness and exhaustion of your first trimester on their way out, you might be doing a little happy dance as you enter your second trimester!

In general, most women feel better during their second trimester. But, of course, there are still changes that will happen in your body as your baby belly continues to grow.

In this article, the experts at Newton Baby tell you when this trimester is, how your baby is growing, what you can expect, and how to care for yourself during these three months.

When Is Your Second Trimester?

The second trimester lasts a little over three months and is the middle of your pregnancy. Your first trimester lasts through week 12, followed by your second trimester from weeks 13 through 27.

Your baby and your belly will both do a lot of growing during these weeks!

Your Baby’s Growth During The Second Trimester

woman in second trimester touching her belly

The little one growing inside your tummy begins the second trimester weighing around .81 ounces (which is 0.05 pounds!) and is 2.9 inches long from their head to their tiny bottom.

By the end of this trimester, they’ve grown quite a bit, weighing about 1.9 pounds and measuring 14.4 inches from head to heel.

In addition to growing longer and fatter, your baby’s senses and organs are also developing. During the second trimester, they’ll start sucking and swallowing, responding to sounds (like the sound of your voice!), and develop fully-formed fingerprints — and those are just a few of the changes!

With all that growth, it’s no surprise that the second trimester is when you (and the rest of the world) will really begin to notice your baby belly.

And with that bigger belly (and pregnancy hormones), come a few new changes you can expect to see in your body over the next several weeks. Let’s jump straight in.

The Second Trimester: What To Expect And What To Do

A Baby Belly

What To Expect

While you felt the effects of pregnancy in the first trimester (hello, morning sickness), you probably didn’t notice much of a baby belly at all. That will change in the second trimester!

Every woman’s body is different, so pregnant moms can start showing at different times. But in general, most notice a baby bump around the very end of the first trimester or the beginning of the second trimester.

Regardless of how quickly your belly grows, the second trimester is when you’ll begin to look pregnant!

What To Do

As you develop your baby bump, consider shopping around for maternity clothes. Your belly will only get bigger from here on out, so it’s worth investing in some clothes that you’ll enjoy wearing.

Even though much of pregnancy is spent preparing for baby’s arrival, don’t forget to take care of yourself during these nine months! That can include stocking up on some cute maternity clothes that you feel great in, or it could be buying something to relax with at home.

pregnant woman curled up with newton baby's weighted blanket

When it comes to relaxing, consider Newton Baby’s Weighted Blanket. This cozy blanket increases serotonin (the happy chemical!) and decreases anxiety — exactly what you need right now during pregnancy and once you’ve got a newborn on your hands!


What To Expect

During the second trimester, you’re carrying around a belly that gets bigger and bigger by the day, so you might start to have backaches.

What To Do

If back pain is bothering you, try following these tips to take good care of your back and keep pain to a minimum:

  • Say goodbye to high heels until your baby makes their appearance.
  • Always lift from the knees. If you’ve got other children, think about how you pick them up.
  • Avoid lifting heavy items altogether.
  • Practice good posture.
  • Sleep on your side with a pillow between your knees.

The Gender-Reveal Ultrasound

couple looking at ultrasound photos

What To Expect

This trimester is when you can have an ultrasound to learn the gender of your baby! It’s usually done around 20 weeks, although male or female genitalia can often be seen earlier.

What To Do

Discuss beforehand with your partner if you want to know if your baby is a boy or a girl or if you’d rather be surprised when they’re born.

Fundal Height Measurements

What To Expect

A few weeks into your second trimester is when your doctor will start taking fundal height measurements.

What is fundal height? It’s the measurement from your pubic bone to the top of your baby bump. It’s not foolproof, but it’s one way to check on your and your baby’s growth.

What To Do

If your fundal height measurement is too small or too large, your doctor will follow up with additional testing or another ultrasound.

Gum Sensitivity

woman in second trimester getting a dental exam

What To Expect

As strange as it may sound, gum sensitivity is something thing that may crop up during your second trimester.

Thanks to hormonal changes, you might notice that your gums are red, sore, irritable, and bleed easily. You might also develop gum disease or gingivitis, which is gum inflammation.

What To Do

Practice good dental care! If you don’t have a good home dental hygiene routine, now is a great time to start. Also, you’ll want to visit the dentist for a cleaning and checkup at least once during your pregnancy.

Consider going now, during your second trimester.


What To Expect

With your first semester (and the nausea that comes with it!) behind you, your appetite will probably return in your second semester. But that doesn’t mean you’re out of the woods!

If you begin to experience heartburn, you’re not alone. Pregnant women often deal with heartburn since the hormone progesterone, which is increased during pregnancy, relaxes the muscle between your stomach and your esophagus.

This means stomach acid can move more easily into the esophagus — hello, heartburn.

What To Do

Eat pregnancy-healthy foods and determine (and avoid) what bothers you — it could be caffeine, spicy foods, greasy foods, or acidic food like citrus.

Try eating smaller, more frequent meals. Also, make sure you eat slowly, chew your food well, and avoid eating before bedtime.

If you can’t seem to get a handle on heartburn, talk to your doctor to see what medicine you can safely take while pregnant.

Changes In Your Sleep

couple snuggling under newton baby's weighted blanket

What To Expect

Your sleep will change in each trimester. And in your second trimester, you’ll become aware of your quickly-growing belly when you lie down to sleep at night.

You might not be as exhausted as you were during the first trimester, but with a bigger belly, it can be difficult to get comfortable in bed.

What To Do

Sleeping on your back becomes more problematic the bigger your belly grows. If you can, start sleeping on your side (to increase blood flow to baby, sleep on your left side if possible!) and try putting a pillow between your legs.

Changes In Your Skin

What To Expect

As the rest of your body changes during pregnancy, so does your skin.

You might develop stretch marks. You could also notice darker skin around your nipples or a dark line from the pubic area extending upward to your belly, which is called a linea nigra.

What To Do

There’s not much you can do to avoid these changes in your skin. However, you’ll want to wear sunscreen when you’re out and about and consider using a stretch mark cream.

And the good news is that if you’ve noticed a linea nigra, it will go away after pregnancy.

More Energy

What To Expect

If your first trimester kept you in bed and on the couch, you’ll notice that you have more energy during your second trimester. Unfortunately, the fatigue will probably return in your third trimester, but for now, enjoy your get-up-and-go!

What To Do

Since pregnancy is usually bookended by tiredness in the first and third trimesters, take advantage of the energy you have right now to do some baby shopping and set up the nursery.

Create a cozy and safe nursery for your baby to play, sleep, and grow in. When purchasing the nursery essentials — like a crib and crib mattress — always keep your little one’s safety in mind.

mom putting baby to bed on a newton baby crib mattress

A breathable crib mattress, like Newton Baby’s Crib Mattress, will keep your baby cool and comfortable all night.

Plus, you’ll put your mind at ease knowing that your little one can breathe straight through the mattress and mattress pad if they roll over during the night.

Take Advantage Of Your Second Trimester

The second trimester is different for every expecting mother. But regardless of how you feel right now, in your third trimester, your belly will be even bigger and you may not have the energy to do many things around the house.

Use your second trimester to get ahead of the game and prepare for the quickly-approaching arrival of your little one!

Take some time for yourself and outfit your nursery with essentials from Newton Baby. Every day you’re getting closer to welcoming your precious baby into your home!

Text Us