Pregnancy Stages

Stages of Pregnancy are divided into three trimesters. Here you'll learn about each one as we explain in detail all the exciting things happening to both you and your growing baby.

Sperm Meets Egg: Weeks 1 to 3 of Pregnancy

Something magical is about to happen! Watch as the ovulation process occurs, and then millions of sperm swim upstream on a quest to fertilize an egg.

First Trimester: Images of Your Developing Baby

Do you know what to expect in the first trimester of pregnancy? We've partnered with the American Institute of Ultrasound Medicine (AIUM), Johns Hopkins, and the March of Dimes to create this unique peak into Baby's development inside the womb during the first trimester. These images reveal all the intricate details of your baby's growth. While most women normally receive one or two ultrasounds during pregnancy, this slideshow of the first trimester of pregnancy gives you a look at each week of development.

Third Trimester: Images of Your Developing Baby

We've partnered with the American Institute of Ultrasound Medicine (AIUM), Johns Hopkins, and the March of Dimes to create this unique peak into Baby's development inside the womb. These images reveal all the intricate details of your baby's growth -- from a collection of cells to a full-term newborn. While most women may only receive one or two ultrasounds during pregnancy, which is normal, this slideshow of the 3rd trimester of pregnancy gives you a look at each week of development.

Second Trimester: Images of Your Developing Baby

We've partnered with the American Institute of Ultrasound Medicine (AIUM), Johns Hopkins, and the March of Dimes to create this unique peak into Baby's development inside the womb. These images reveal all the intricate details of your baby's growth -- from a collection of cells to a full-term newborn. While most women may only receive one or two ultrasounds during pregnancy, which is normal, this slideshow of the 2nd trimester of pregnancy gives you a look at each week of development.

Ultrasound: A Trimester-by-Trimester Guide

Find out what to expect at your first and second trimester ultrasound appointments, what you can learn from those ultrasounds, and why you might need an ultrasound (or a few) in the third trimester.

Embryo to Fetus: Weeks 9 to 12 of Pregnancy

You're well into your first trimester at this point, and your baby is growing bigger and bigger each day. Watch what it takes for her to become a fetus.

Your First Trimester Diet

Eating well now and throughout your pregnancy is crucial. Make sure you get off on the right foot.

Growing Big: Weeks 31 to 34 of Pregnancy

Your baby now weighs about three pounds, roughly the size of a melon. Get the scoop on how much more she'll grow before she's born--and what new developments she's making right now.

Quiz: Should You Learn Your Baby's Sex?

Trying to figure out if you want to learn the sex of your baby-to-be? It is a tough choice to make! Let our quiz help you and your partner make the best decision possible for your growing family.

Take Quiz

See the Incredible Ultrasound Image of Twins Kissing in Utero

These expectant parents were so surprised when an ultrasound photo captured their twin daughters cuddling and kissing in the womb.

Baby's Awesome Ultrasound Shows It's Ready to Rock

This Utah couple's baby just flashed the rock-on sign in its sonogram!

Twins: A Closer Look at Your Developing Babies

Parents.com partnered with the American Institute of Ultrasound Medicine (AIUM) to create this unique peak into a baby's development inside the womb. These images reveal all the intricate details of a baby's growth -- from a collection of cells to a full-term newborn. While most women may only receive one or two ultrasounds during pregnancy, which is normal, this slideshow of the 3rd trimester of pregnancy gives you a look at each week of development.

How Big Is Your Baby in Second Trimester?

Wonder how big your baby is now? Here's an approximate look at size, weight and height in the second trimester.

6 Strange Pregnancy Symptoms

Everyone expects morning sickness and funny cravings during pregnancy, but there are plenty of other strange pregnancy symptoms you might not know about.

10 First Trimester To-Dos

Congratulations on your pregnancy! You've seen the positive markers on an at-home pregnancy test and a blood test has confirmed you're expecting. Now what do you do? Our checklist will help you get through your first trimester and pave the way for the rest of your pregnancy ... and your new life with Baby!

Fetal Movement: Feeling Baby Kick

Experts answer your top questions about your developing baby's movements, from when she'll start kicking to how often you should feel her kick.

Fetal Development Weeks 31 Through 35

See what's happening with your baby in the eighth month of your pregnancy.

An Embryo Forms: Weeks 4 to 8 of Pregnancy

Chances are you have no idea you're pregnant yet-but your body is already hard at work. Watch as the egg undergoes its wondrous transformation to embryo.

Sleep Cycles: Weeks 26 to 30 of Pregnancy

At this point, your baby is awake and asleep at very specific times of the day. Find out about his sleep patterns, and what they mean.

Feeling Baby Move: Weeks 18 to 21 of Pregnancy

You'll start feel your baby's fluttering movements (called quickening) between now and 22 weeks. Get ready, mama: Feeling him kick is one of the most magical parts of being pregnant.

Topics in Pregnancy Stages