Week —
First trimester

Week 6 of Pregnancy

🫛
About the size of a lentil
0.2 in · 0.5 cm · 0.0 oz · 0 g (crown to rump)

🌱Your baby this week

  • The heart tube begins to beat and may already be visible on an early ultrasound.
  • The neural tube is closing; the brain's three main regions take shape.
  • Tiny arm and leg buds appear.

🫧What you may be feeling

  • Morning sickness often starts
  • Sore, fuller breasts
  • Food aversions and mood swings

🤍Gentle tips for this week

  • Many providers suggest vitamin B6 and ginger for nausea — ask yours for dosing.
  • Keep plain crackers by the bed and eat a few before getting up.

Common question for week 6

When can you see the heartbeat on an ultrasound?

A flutter is often visible from about 6 weeks with a transvaginal ultrasound, sometimes a bit later. If an early scan does not show it yet, a repeat scan a week or two later usually does.

Every pregnancy is different. Sizes are averages, symptoms vary widely, and none of this replaces the guidance of your own provider.