Week by week

A gentle, guided journey from week 4 to 40.

Pick a week to see how baby is growing, what's changing for her, one practical partner action, and any red flags to watch for. Each week has its own page so it loads quickly and can be bookmarked.

Trimester 1 · weeks 4–13

T1
Week 4
Size of a poppy seed
T1
Week 5
Size of a sesame seed
T1
Week 6
Size of a lentil
T1
Week 7
Size of a blueberry
T1
Week 8
Size of a raspberry
T1
Week 9
Size of a cherry
T1
Week 10
Size of a strawberry
T1
Week 11
Size of a lime
T1
Week 12
Size of a plum
T1
Week 13
Size of a peach

Trimester 2 · weeks 14–27

T2
Week 14
Size of a lemon
T2
Week 15
Size of a apple
T2
Week 16
Size of a avocado
T2
Week 17
Size of a pear
T2
Week 18
Size of a navel orange
T2
Week 19
Size of a sweet potato
T2
Week 20
Size of a mango
T2
Week 21
Size of a banana
T2
Week 22
Size of a pomegranate
T2
Week 23
Size of a papaya
T2
Week 24
Size of a grapefruit
T2
Week 25
Size of a cauliflower
T2
Week 26
Size of a lettuce
T2
Week 27
Size of a squash

Trimester 3 · weeks 28–40

T3
Week 28
Size of a large mango
T3
Week 29
Size of a cantaloupe
T3
Week 30
Size of a cabbage
T3
Week 31
Size of a coconut
T3
Week 32
Size of a pineapple
T3
Week 33
Size of a butternut squash
T3
Week 34
Size of a cucumber
T3
Week 35
Size of a honeydew
T3
Week 36
Size of a romaine lettuce
T3
Week 37
Size of a leek
T3
Week 38
Size of a mini watermelon
T3
Week 39
Size of a swiss chard
T3
Week 40
Size of a winter melon

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Information adapted from NHS, HSE and CDC pregnancy resources.