Week by week
You're 4 weeks pregnant: what to plan
Drag along the weeks, tap one, or use the arrow keys
Planning milestone
Baby is about the size of
a poppy seed
- Length · head to bottom
- under ¼ in
- Weight
- under 1 oz
Averages only. The dashed rings show baby’s size at 27 and 40 weeks. Your scans are what count.
Week 4
First trimester · 36 weeks to your due date
Early weeks are a good time to get the money and paperwork side organised.
- Look up when to add a baby to your insurance plan
- Set up a separate savings account for baby costs
- Sketch a rough timeline for telling family and work
- Keep appointments in a shared calendar
Week 4poppy seedCalculate your due date
Estimate only — talk to your healthcare provider about your due date.
Pregnancy week by week
What to plan, buy and book at each stage.
- Week 4
- Week 5
- Week 6
- Week 7
- Week 8Start your pregnancy budget
- Week 9
- Week 10
- Week 11
- Week 12Research childcare waitlists
- Week 13
- Week 14
- Week 15
- Week 16Compare strollers and car seats
- Week 17
- Week 18
- Week 19
- Week 20Create your registry
- Week 21
- Week 22
- Week 23
- Week 24Plan the baby shower
- Week 25
- Week 26
- Week 27
- Week 28Book parenting classes
- Week 29
- Week 30
- Week 31
- Week 32Choose a pediatrician
- Week 33
- Week 34
- Week 35Pack the hospital bag
- Week 36Install the car seat
- Week 37
- Week 38
- Week 39
- Week 40Due date week
- Week 41
- Week 42