Pregnancy Week by Week
Get Excited for Every Milestone: Our “Pregnancy Week by Week” articles provide an in-depth look at the incredible journey of nurturing new life inside your body. Each week, we’ll take you through the developmental milestones your baby is reaching, as well as the physical and emotional changes you can expect.
First Trimester
1 Week Pregnant
You aren't actually pregnant yet, but your body is preparing for conception.
2 Week Pregnant
Your egg is fertilized by sperm, creating a single cell that will become your baby.
3 Week Pregnant
The fertilized egg travels to the uterus and begins to implant into the uterine lining.
4 Week Pregnant
Your baby is now the size of a poppy seed, and the placenta is developing.
5 Week Pregnant
The heart and circulatory system are forming, and you may start experiencing pregnancy symptoms.
6 Week Pregnant
Your baby's facial features are starting to develop, and morning sickness may be kicking in.
7 Week Pregnant
Your baby is now about the size of a blueberry, and the brain and neural pathways are forming.
8 Week Pregnant
All of your baby's major organs and body systems are now in place.
9 Week Pregnant
Your baby is now officially a fetus and is starting to move around.
10 Week Pregnant
Your baby's fingers and toes are no longer webbed, and the placenta is now fully functional.
11 Week Pregnant
Your baby's sex is determined, but you won't be able to find out for a few more weeks.
12 Week Pregnant
Your baby is the size of a plum, and the first trimester is coming to an end.
13 Week Pregnant
Your baby's vocal cords are forming, and you may start to feel more energy.
Second Trimester
14 Week Pregnant
Your baby is now covered in fine hair, and you may be starting to show.
15 Week Pregnant
Your baby's senses are developing, and you may be able to feel their movements.
16 Week Pregnant
Your baby's bones are hardening, and you may start to feel more pronounced kicks.
17 Week Pregnant
Your baby is now the size of a pear, and you may start to feel Braxton Hicks contractions.
18 Week Pregnant
Your baby is now covered in a white, waxy substance called vernix, which protects their skin.
19 Week Pregnant
Your baby's movements are becoming more coordinated, and you may be able to find out their sex.
20 Week Pregnant
Your baby is halfway there! You may be able to feel their hiccups and their hearing is developing.
21 Week Pregnant
Your baby's eyebrows and eyelids are now fully formed, and they are beginning to produce meconium.
22 Week Pregnant
Your baby is the size of a papaya, and their taste buds are developing.
23 Week Pregnant
Your baby can hear sounds from outside your body, such as your voice or the voices of the people around you.
24 Week Pregnant
Your baby's lungs are developing and your baby is getting stronger and stronger each day.
25 Week Pregnant
Your baby is now the size of a rutabaga, and their kicks are becoming more forceful.
26 Week Pregnant
Your baby's eyes are opening for the first time, and they are starting to develop more fat.
27 Week Pregnant
Your baby's brain is rapidly developing, and they are practicing breathing movements.
Third Trimester
28 Week Pregnant
Your baby is the size of an eggplant, and you may be experiencing more Braxton Hicks contractions.
29 Week Pregnant
Your baby's body is becoming more proportional, and they are getting ready for a growth spurt.
30 Week Pregnant
Your baby's bones are now fully developed, and they are starting to regulate their own body temperature.
31 Week Pregnant
Your baby is now the size of a coconut, and their immune system is developing.
32 Week Pregnant
Your baby is practicing their sucking and swallowing reflexes, and you may be experiencing more discomfort.
33 Week Pregnant
Your baby is the size of a pineapple, and their skin is becoming smoother.
34 Week Pregnant
Your baby's central nervous system is maturing, and they are getting ready for the final stretch.
35 Week Pregnant
Your baby is now the size of a honeydew melon, and they are starting to prepare for birth.
36 Week Pregnant
Your baby's head is starting to move down into your pelvis, and you may be feeling more pressure.
37 Week Pregnant
Your baby is now considered full-term, and they are ready to make their entrance into the world.
38 Week Pregnant
Your baby is the size of a hubard squash, and their lungs are now fully mature.
39 Week Pregnant
Your baby's fingernails are now fully formed, and they are still gaining weight.
40 Week Pregnant
Your due date has arrived! Your baby could come at any moment, and you may be feeling a mix of excitement and nervousness.