Pregnancy Scan Date Calculator
Estimate common prenatal ultrasound and screening windows from pregnancy dating.
Your estimated windows will appear here.
Estimated pregnancy scan dates
- Common anatomy ultrasound window
18w0d–22w6d - Common optional NT scheduling window
11w0d–13w6d - Estimated due date
The exact NT window depends on the clinic, laboratory protocol, pregnancy dating, and fetal crown–rump length. Other ultrasounds are scheduled for specific clinical reasons rather than one universal calendar.
This planner does not schedule care or determine which screening is appropriate. Screening choices, local protocols, dating changes, and individual medical needs affect timing. Confirm all dates with the care team.