Unplanned or unsure? Find out Sexwise has more information and support. Sign up for Start4Life's pregnancy and baby emails for expert advice, videos and tips on pregnancy, birth and beyond. health things you should know when you're pregnantДЇind out about what's happening when you're:.If you do not know it or are unsure, speak to a midwife or GP.ДЄs part of your pregnancy (antenatal) care, your midwife will offer you a 12-week scan that may give you a more accurate date for the birth of your baby. You need to know the first day of your last period to use this calculator. Pregnancy normally lasts from 37 weeks to 42 weeks from the first day of your last period. On the last day of your menstrual period, the due date can be. In the case of natural conception, treatment with fertility drugs or IUI (intrauterine insemination), due date calculations are based on the first day of LMP. If you have irregular menstrual cycles, it is not accurate to use this dating tool. An average number is 40 weeks or 280 days. Date of conception: Based on 266 days before the estimated due date.

ToВ findВ yourВ due date, enter the date ofВ the first day of your last period, and select 'show your due date'. The normal duration of pregnancy week range is approximately 36 to 42 weeks. Adjust the cycle length if your cycle is shorter or longer If you know when you conceived, our pregnancy calculator calculates your due date by adding 38 weeks to the date of conception. Follow your babys new developments in weeks and. Some women's cycles are not exactly 28 days. Calculate your pregnancy due date and then create your own personalized pregnancy calendar week-by-week.

Due date calculator by conception date