Baby Growth Chart - Average Weekly Size for Weeks 13-25

Please Note:
- Pregnancy weeks are counted from your last menstrual period.
- Weeks 3-19, measurements are taken from head to rump.
- Weeks 20-40, measurements are taken from head to toe.

Week 13

Fetus Size
Your baby is about the size of a plum during week 13.

LENGTH: 3.0 in / 7.62 cm
WEIGHT: 0.9 oz / 25.5 g

Fetus Image Week 13 >>

Week 14

Fetus Size
Your baby is about the size of a lemon during week 14.

LENGTH: 3.51 in / 8.92 cm
WEIGHT: 1.60 oz / 45.4 g

Fetus Image Week 14 >>

Week 15

Fetus Size
Your baby is about the size of a peach during week 15.

LENGTH: 4.17 in / 10.59 cm
WEIGHT: 2.56 oz / 72.6 g

Fetus Image Week 15 >>

Week 16

Fetus Size
Your baby is about the size of an avocado during week 16.

LENGTH: 4.69 in / 11.9 cm
WEIGHT: 3.66 oz / 103.8 g

Fetus Image Week 16 >>

Week 17

Fetus Size
Your baby is about the size of an apple during week 17.

LENGTH: 5.25 in / 13.3 cm
WEIGHT: 5.04 oz / 142.3 g

Fetus Image Week 17 >>

Week 18

Fetus Size
Your baby is about the size of an orange during week 18.

LENGTH: 5.67 in / 14.4 cm
WEIGHT: 6.03 oz / 170.9 g

Fetus Image Week 18 >>

Week 19

Fetus Size
Your baby is about the size of an onion during week 19.

LENGTH: 6.17 in / 15.7 cm
WEIGHT: 8.58 oz / 243.2 g

Fetus Image Week 19 >>

Please note: Measurements are taken from head to toe for weeks 20-40.

Week 20

Fetus Size
Your baby is about the size of a pomegranate during week 20.

LENGTH: 6.60 in / 26 cm
WEIGHT: 10.69 oz / 303.1 g

Fetus Image Week 20 >>

Week 21

Fetus Size
Your baby is about the size of a mango during week 21.

LENGTH: 10.68 in / 27.1 cm
WEIGHT: 12.9 oz / 365.7 g

Fetus Image Week 21 >>

Week 22

Fetus Size
Your baby is about the size of jicama during week 22.

LENGTH: 11.03 in / 28 cm
WEIGHT: 15.32 oz / 434.3 g

Fetus Image Week 22 >>

Week 23

Fetus Size
Your baby is about the size of a grapefruit during week 23.

LENGTH: 11.49 in / 29.2 cm
WEIGHT: 1.13 lb / 512.6 g

Fetus Image Week 23 >>

Week 24

Fetus Size
Your baby is about the size of a coconut during week 24.

LENGTH: 12.02 in / 30.5 cm
WEIGHT: 1.39 lb / 630.5 g

Fetus Image Week 24 >>

Week 25

Fetus Size
Your baby is about the size of a papaya during week 25.

LENGTH: 12.93 in / 32.8 cm
WEIGHT: 1.49 lb / 675.9 g

Fetus Image Week 25 >>