The fetus starts to practice tiny movements
Baby this week: about 4.1 cm — crown to rump · about 7 g
≈ 4.1 cm — about the size of a fig
Illustration enlarged for clarity — the amber marker shows true relative size
Your baby this week
- Fingers and toes are fully separated and starting to grow tiny nails
- The head makes up almost half the body length at this stage
- External genitals are starting to develop, though it's still too early to tell sex on ultrasound
- Hiccups may begin, though they can't be felt from the outside yet
Your body this week
- Nausea often begins to ease for many people around this time, though not everyone experiences relief this early
- Some notice their skin starting to look different as blood volume increases
This week's tip: If offered, this is around when a first-trimester screening test is typically scheduled — talk to your provider about the timing that fits your care plan.
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.