The fetus can now make small facial expressions
Baby this week: about 11.6 cm — crown to rump · about 100 g
≈ 11.6 cm — about the size of an avocado
Illustration enlarged for clarity — the amber marker shows true relative size
Your baby this week
- Tiny facial muscles allow subtle expressions like squints and frowns
- The circulatory system and urinary tract are fully functioning
- Toenails are growing, a little behind the fingernails
- The heart is pumping steadily, and the baby's own blood is circulating through the body and umbilical cord.
Your body this week
- Some people start feeling the first faint flutters of movement around now, though it's often mistaken for gas this early
- A pregnancy glow — brighter skin and shinier hair — is common as blood volume and oil production increase
This week's tip: If you haven't scheduled your mid-pregnancy anatomy scan, ask your provider when it's typically done in their practice.
When to get help now
Call emergency services now or go to an emergency department now if you have sudden, severe tummy pain, pain in the tip of your shoulder, feel very weak, faint or dizzy, or have heavy bleeding that soaks a pad soon after putting it on. For lighter bleeding or spotting, or pain low down on one side, contact your doctor, maternity unit or an early pregnancy unit today.
Sizes and milestones are typical ranges — every pregnancy runs on its own clock. Educational content; your prenatal care team's guidance always comes first.