Second Trimester

The second trimester spans from week 13 to the end of week 26. During this time, your baby continues to grow and develop almost all of the features they'll have at birth. Many women find that symptoms like nausea and fatigue improve during this trimester, but other symptoms may continue or begin.

Week by Week Development

13
Week 13
Baby size: Lemon

The fetus begins to move, and its facial muscles develop. The skeleton continues to form, and the fetus can make sucking movements.

Video available
14
Week 14
Baby size: Navel orange

The fetus begins to move, and its facial muscles develop. The skeleton continues to form, and the fetus can make sucking movements.

Video available
15
Week 15
Baby size: Apple

The fetus begins to move, and its facial muscles develop. The skeleton continues to form, and the fetus can make sucking movements.

Video available
16
Week 16
Baby size: Avocado

The fetus begins to move, and its facial muscles develop. The skeleton continues to form, and the fetus can make sucking movements.

Video available
17
Week 17
Baby size: Pomegranate

You might feel the baby move for the first time. The baby's hearing develops, and it may respond to loud sounds. A protective coating called vernix covers the skin.

Video available
18
Week 18
Baby size: Sweet potato

You might feel the baby move for the first time. The baby's hearing develops, and it may respond to loud sounds. A protective coating called vernix covers the skin.

Video available
19
Week 19
Baby size: Mango

You might feel the baby move for the first time. The baby's hearing develops, and it may respond to loud sounds. A protective coating called vernix covers the skin.

Video available
20
Week 20
Baby size: Banana

You might feel the baby move for the first time. The baby's hearing develops, and it may respond to loud sounds. A protective coating called vernix covers the skin.

Video available
21
Week 21
Baby size: Carrot

The baby's lungs begin to develop. Footprints and fingerprints are forming, and the baby begins to develop a sleep cycle.

Video available
22
Week 22
Baby size: Spaghetti squash

The baby's lungs begin to develop. Footprints and fingerprints are forming, and the baby begins to develop a sleep cycle.

Video available
23
Week 23
Baby size: Large mango

The baby's lungs begin to develop. Footprints and fingerprints are forming, and the baby begins to develop a sleep cycle.

Video available
24
Week 24
Baby size: Ear of corn

The baby's lungs begin to develop. Footprints and fingerprints are forming, and the baby begins to develop a sleep cycle.

Video available
25
Week 25
Baby size: Rutabaga

The baby's brain develops rapidly, and the nervous system becomes more complex. The baby may hiccup, causing rhythmic movements.

Video available
26
Week 26
Baby size: Scallion

The baby's brain develops rapidly, and the nervous system becomes more complex. The baby may hiccup, causing rhythmic movements.

Video available