What to focus on this week
Focus on anatomy-scan timing, registry basics, movement changes, and simple home planning.
BumpCalc guide
Pregnancy Week 21
Week 21 is one step in the 40-week pregnancy timeline. Use the calculator below to check your estimated due date, current week, trimester, and next milestone.
Live toolUpdates instantly
Estimated due dateFebruary 11, 2027
Current weekWeek 1
TrimesterNot pregnant yet
Pregnancy startMay 7, 2026
Next milestoneYour first prenatal visit is usually the next big planning step.
Common changes
Movement patterns, registry decisions, and practical home planning usually become more important now.
Planning checklist
- Review upcoming scans
- Start registry basics
- Explore baby names
- Plan practical meals
Helpful tools
Quick answers
Common questions
What trimester is pregnancy week 21?
Pregnancy week 21 is usually in the second trimester.
Can my due date change?
Yes. A clinician may adjust your due date after an ultrasound or review of your cycle history.