Your Baby's Growth Journey

Trimester 1

Week 1
Week 1

Your baby is the size of a poppy seed. At this early stage, a fertilized egg has implanted itself in your uterine lining and is beginning its miraculous transformation.

Week 2
Week 2

Your baby is the size of a sesame seed. The embryo is forming major organs and systems—starting with the brain and spinal cord.

Week 3
Week 3

Your baby is the size of a lentil. The heart has started to beat and circulate blood, a big milestone!

Week 4
Week 4

Your baby is the size of a poppy seed. Neural tube development continues and arm/leg buds are beginning to show.

Week 5
Week 5

Your baby is the size of an apple seed. Facial features are taking shape and the heart is pumping stronger.

Week 6
Week 6

Your baby is the size of a sweet pea. Tiny fingers and toes are forming, and baby may start moving soon.

Week 7
Week 7

Your baby is the size of a blueberry. The brain is developing rapidly, and limbs are elongating.

Week 8
Week 8

Your baby is the size of a raspberry. Eyelids, ears, and the tip of the nose are now visible.

Week 9
Week 9

Your baby is the size of a grape. Muscles are forming and movements may begin—though you won’t feel them yet.

Week 10
Week 10

Your baby is the size of a kumquat. Vital organs are functioning, and the embryo is now considered a fetus.

Week 11
Week 11

Your baby is the size of a fig. Baby can open and close hands, and tooth buds are forming.

Week 12
Week 12

Your baby is the size of a lime. Reflexes are developing—baby may wiggle if touched.

Week 13
Week 13

Your baby is the size of a peach. Vocal cords are forming, and baby has fingerprints!

Trimester 2

Week 14
Week 14

Your baby is the size of a lemon. Hair and eyebrows are beginning to grow.

Week 15
Week 15

Your baby is the size of an apple. You may soon feel flutters as baby gets more active.

Week 16
Week 16

Your baby is the size of an avocado. Facial expressions are developing.

Week 17
Week 17

Your baby is the size of a turnip. Skeleton is changing from cartilage to bone.

Week 18
Week 18

Your baby is the size of a bell pepper. Ears are in final position and baby may hear your voice.

Week 19
Week 19

Your baby is the size of a mango. Vernix (a protective coating) is forming on skin.

Week 20
Week 20

Your baby is the size of a banana. Halfway there! You may feel stronger movements.

Week 21
Week 21

Your baby is the size of a carrot. Baby is practicing swallowing amniotic fluid.

Week 22
Week 22

Your baby is the size of a spaghetti squash. Eyelids and eyebrows are fully formed.

Week 23
Week 23

Your baby is the size of a grapefruit. Lungs are developing and baby can sense light.

Week 24
Week 24

Your baby is the size of a papaya. Taste buds are forming and lungs continue to mature.

Week 25
Week 25

Your baby is the size of an ear of corn. Baby is gaining fat and filling out.

Week 26
Week 26

Your baby is the size of a scallion. Eyes are forming and may start blinking.

Week 27
Week 27

Your baby is the size of a head of cauliflower. Baby can respond to sounds and touch.

Trimester 3

Week 28
Week 28

Your baby is the size of a large eggplant. Rapid brain development continues.

Week 29
Week 29

Your baby is the size of a butternut squash. Muscles and lungs are strengthening.

Week 30
Week 30

Your baby is the size of a cabbage. Eyes can open and baby starts regulating temperature.

Week 31
Week 31

Your baby is the size of a romaine lettuce. Baby is gaining more fat for warmth.

Week 32
Week 32

Your baby is the size of a jicama. Fingernails are fully grown.

Week 33
Week 33

Your baby is the size of a pineapple. Skull remains soft for delivery.

Week 34
Week 34

Your baby is the size of a cantaloupe. Central nervous system is maturing.

Week 35
Week 35

Your baby is the size of a honeydew melon. Baby is mostly developed and just growing bigger.

Week 36
Week 36

Your baby is the size of a coconut. Head may be moving into birth position.

Week 37
Week 37

Your baby is the size of a swiss chard bunch. Baby is considered full-term.

Week 38
Week 38

Your baby is the size of a pumpkin. Organs are ready for life outside the womb.

Week 39
Week 39

Your baby is the size of a watermelon. Any day now—you’re ready to deliver!

Week 40
Week 40

Your baby is ready to meet the world! Final touches are complete—time to welcome your baby.