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 red flags to watch for.

Find your current week instantly

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 aubergine
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 watermelon

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Information adapted from NHS, HSE and CDC pregnancy resources.