Baby Growth Chart - Average Weekly Size for Weeks 3-12

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 3

Embryo Size
Your baby is about the size of a poppy seed during week 3.

LENGTH: 0.03 in / 0.08 cm
WEIGHT: 0.002 oz / 0.06 g

Embryo Image Week 3 >>

Week 4

Embryo Size
Your baby is about the size of a sesame seed during week 4.

LENGTH: 0.05 in / 0.13 cm
WEIGHT: 0.004 oz / 0.11 g

Embryo Image Week 4 >>

Week 5

Embryo Size
Your baby is about the size of a sunflower seed during week 5.

LENGTH: 0.09 in / 0.23 cm
WEIGHT: 0.007 oz / 0.19 g

Embryo Image Week 5 >>

Week 6

Embryo Size
Your baby is about the size of a raisin during week 6.

LENGTH: 0.15 in / 0.38 cm
WEIGHT: 0.01 oz / 0.28 g

Embryo Image Week 6 >>

Week 7

Embryo Size
Your baby is about the size of a blueberry during week 7.

LENGTH: 0.31 in / 0.79 cm
WEIGHT: 0.02 oz / 0.5 g

Embryo Image Week 7 >>

Week 8

Embryo Size
Your baby is about the size of a raspberry during week 8.

LENGTH: 0.58 in / 1.5 cm
WEIGHT: 0.04 oz / 1 g

Embryo Image Week 8 >>

Week 9

Embryo Size
Your baby is about the size of a cherry during week 9.

LENGTH: 0.80 in / 2 cm
WEIGHT: 0.07 oz / 2 g

Embryo Image Week 9 >>

Week 10

Embryo Size
Your baby is about the size of a strawberry during week 10.

LENGTH: 1.20 in / 3 cm
WEIGHT: 0.13 oz / 3.7 g

Embryo Image Week 10 >>

Week 11

Fetus Size
Your baby is about the size of a apricot during week 11.

LENGTH: 1.7 in / 4.3 cm
WEIGHT: 0.28 oz / 7.9 g

Fetus Image Week 11 >>

Week 12

Fetus Size
Your baby is about the size of a lime during week 12.

LENGTH: 2.3 in / 5.8 cm
WEIGHT: 0.51 oz / 14.4 g

Fetus Image Week 12 >>