Antenatal Baby Birth School Pregnancy Calculator : Last Menstrual Period : January February March April May June July August September October November December 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 2020 2021 2022 2023 2024 2025 Probable date of conception : ( about two weeks after last menstrual period ) January February March April May June July August September October November December 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 2020 2021 2022 2023 2024 2025 Foetal Age Today : Weeks 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Days 0 1 2 3 4 5 6 7 Best date range for NT scan : ( 12 wks 3 days to 13 wks 3 days ) 19 Weeks / Morphology Scan Date : Estimated Due Date (40 Weeks) : January February March April May June July August September October November December 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 2020 2021 2022 2023 2024 2025 On January February March April May June July August September October November December 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 2021 2022 2023 2024 2025 , you will be weeks days pregnant. Previous Ultrasound Date and Foetal Age On That Day : January February March April May June July August September October November December 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 2020 2021 2022 2023 2024 2025 Weeks 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Days 0 1 2 3 4 5 6 7