Is it possible to ovulate later than what the average timing would be? more details below hi, i went off the pill in january after 10 years. i had my last period on 1/25, which estimates my ovulation date around 2/8. i missed my feb period but had 2

Congratulations : Congratulations on your pregnancy! dates of conception are estimations made by calculations from the last menstrual period and ultrasound measurements. They can be off by a week or so. Not everyone ovulates on "day 14" of the menstrual cycle which is the number used to calculate due dates from the last menstrual period. That's why the "rhythm method" of birth control doesn't work very well. (i conceived my daughter on "day 3"!) with what you experienced with the negative pregnancy tests and the measurements from the early ultrasound, you more than likely ovulated and became pregnant later in your cycle and are 6 weeks along instead of 8.