5 Weeks Pregnant
At 5 weeks pregnant, your baby is about the size of a poppy seed.
- Length
- 2 mm
- Weight
- less than 1 g
- Trimester
- First
- Month
- Month 2
- Weeks to go
- 35
Size of a poppy seed
Your baby at 5 weeks
Still about the size of a poppy seed, your baby is growing fast. The neural tube, which becomes the brain and spinal cord, is forming, and a simple tube that will become the heart is starting to pulse.
Your body at 5 weeks
hCG and progesterone are climbing quickly. Many people first notice symptoms now, from nausea to needing to pee more often.
Common symptoms at 5 weeks pregnant
- Nausea, with or without vomiting
- Breast tenderness
- Frequent urination
- Tiredness
- Heightened sense of smell
Every pregnancy is different. Having none of these symptoms is normal too.
Tips for week 5
- Eat small meals every two to three hours; an empty stomach makes nausea worse.
- Keep plain crackers by your bed for the morning.
- Limit caffeine to 200 mg a day, roughly one 12 oz coffee.
Your week 5 checklist
- Book your first prenatal appointment
- Limit caffeine to 200 mg a day
- Stock up on small, bland snacks
Helpful at 5 weeks
5 Weeks Pregnant: your questions answered
How big is a baby at 5 weeks pregnant?
At 5 weeks your baby is about the size of a poppy seed: around 2 mm long and weighing less than 1 g. Every baby grows at their own pace.
How many months is 5 weeks pregnant?
5 weeks pregnant is month 2 of your pregnancy, in the first trimester. Your due date is 35 weeks away.
Can you see a baby on an ultrasound at 5 weeks?
Usually only a small gestational sac, sometimes with a yolk sac. An embryo and heartbeat are more often seen from around 6 to 7 weeks.
Sources
This guide is written from public guidance by the American College of Obstetricians and Gynecologists (ACOG), the NHS, the CDC and the World Health Organization. Baby sizes are averages; your baby may be bigger or smaller and still perfectly healthy.
General information only, not medical advice.
History of updates
- : Added a weekly checklist and common questions.
- : Matched fruit, length and weight to the Prego app.
- : Published.