Week by week
Your pregnancy, one week at a time.
How big your baby is, what to expect, and what might happen next. Every week, written for you and free in the app.
First trimester
Weeks 1 to 13. The quiet, exhausting, nobody-knows-yet stretch.
Week 4a poppy seed
Smaller than a poppy seed, but already bursting with potential.
Week 5a sesame seed
Tiny as a sesame seed, but already starting the incredible work of building a human.
Week 6a lentil
About the size of a lentil, with a teeny-tiny heart starting to flutter.
Week 7a blueberry
About the size of a blueberry, with tiny limb buds starting to form.
Week 8a kidney bean
About the size of a raspberry, with tiny paddles for hands and feet starting to form.
Week 9a green olive
About the size of a cherry, with tiny fingers forming this week.
Week 10a kumquat
About the size of a strawberry, with delicate fingers and toes starting to form.
Week 11a fig
About the size of a lime, with tiny fingers and toes forming.
Week 12a lime
About the size of a plum, with tiny reflexes starting to form.
Week 13a lemon
About the size of a peach, with tiny fingerprints forming.
Second trimester
Weeks 14 to 27. The energy comes back, and so does the appetite.
Week 14a peach
About the size of a lemon, with tiny fingerprints forming.
Week 15an apple
About the size of an avocado, with eyelids that can now squint against light.
Week 16an avocado
About the size of an avocado, and finally moving in ways you might feel.
Week 17a pear
About the size of a pomegranate, with tiny bones starting to harden and a busy little heartbeat.
Week 18a bell pepper
Your baby’s busy flexing their muscles and exploring their newfound sense of touch.
Week 19a mango
About the size of a mango, with limbs now strong enough for proper kicks.
Week 20a banana
About the size of a banana, and making themselves known with tiny kicks.
Week 21a pomegranate
About as long as a banana, and moving in ways you'll start to notice.
Week 22a papaya
About the size of a spaghetti squash, with tiny eyebrows and eyelashes taking shape.
Week 23a grapefruit
About the size of a grapefruit, and getting stronger each day.
Week 24an ear of corn
About the length of an ear of corn, with eyelids that can now blink.
Week 25an eggplant
About the size of a cauliflower, and starting to respond to sounds and light.
Week 26a zucchini
About the size of a head of lettuce, with eyes that might blink at light.
Week 27a bunch of grapes
About the size of a cauliflower, with more defined sleep-wake cycles.
Third trimester
Week 28 to the finish line, including the last few weeks when you're about to have it.
Week 28a cauliflower
About the size of a small cabbage, with eyelashes that flutter.
Week 29a butternut squash
About the size of a butternut squash, and practicing breathing moves.
Week 30a cabbage
About the size of a large cabbage, and getting stronger every day.
Week 31a pineapple
About the size of a pineapple, and practicing breathing movements.
Week 32an acorn squash
Weighing about 3.7 pounds, your baby’s getting rounder by the day as fat builds up under their skin.
Week 33a coconut
About the size of a coconut, your baby is gaining weight rapidly and preparing for life outside the womb.
Week 34a cantaloupe
**About the size of a cantaloupe,** with chubby cheeks forming and sleep cycles emerging.
Week 35a honeydew melon
About the size of a honeydew melon, filling your belly with every wriggle and stretch.
Week 36a head of romaine lettuce
About the size of a head of romaine lettuce, your baby is nearly ready to meet the world.
Week 37a bunch of Swiss chard
About the size of a bunch of Swiss chard, and packing on those final layers of fat.
Week 38a leek
**About the length of a leek** and plumping up fast, your baby is likely tucked chin-to-chest now, coiled and ready.
Week 39a mini watermelon
About the size of a mini watermelon, your baby’s likely snugly engaged in your pelvis, ready for their grand entrance.
Week 40a small pumpkin
About the size of a small pumpkin, and ready to meet you face to face.
Week 41a watermelon
As big as a small watermelon now, with plump cheeks and a strong grip.
Week 42a jackfruit
As big as a jackfruit now, with cheeks ready for endless kisses.
