§first trimester · week 1 of 40
you're 1 weeks pregnant.
last revised · baby is about 0.005 cm (0.00") · 0.001 g (0.00 oz)
about the size of a pollen.
Pregnancy is counted from your last period — there is no baby yet this week. Your body is preparing the lining of the uterus for ovulation and conception.
this week's highlights
- Last period start (LMP)
- Uterine lining rebuilds
- Hormones begin shifting
- Take a prenatal vitamin
how your baby looks
There's no embryo yet — these first two weeks count from your last period. Your body is simply getting ready.
body in focus
- head
- body
- hands
- feet
what's happening in your body
You are technically not pregnant yet. Your period started this week and your uterus is shedding and rebuilding its lining for the next cycle.
gentle tips
- Start a prenatal vitamin with at least 400 mcg folic acid.
- Track your cycle so you'll know when ovulation hits.
- Cut alcohol and limit caffeine to one small cup a day.
- Stock the kitchen with iron and folate-rich foods like leafy greens and beans.
what to expect next
Ovulation usually happens around week 2, when conception becomes possible. Knowing your fertile window helps you time things — or simply pay attention.