First Trimester Screening Date Calculator
Calculate your first trimester screening window (11-14 weeks) for combined blood work and ultrasound tests.
Screening Window Start
3/19/2026
11 weeks from LMP
Screening Window End
4/9/2026
14 weeks from LMP
Ideal Date (12 Weeks)
3/26/2026
Current Week
16 weeks, 4 days