If you are unsure of who the baby s father is now really is the time to sort it out.
Baby conceived date calculator.
The most common way to calculate your pregnancy due date is by counting 40 weeks from the first day of your last menstrual period lmp.
Based on that date you can make a guess as to who the father is but it will only be a guess.
The pregnancy conception calculator estimates the date of conception based on the expected due date of the pregnancy last period date or ultrasound date.
Calculate a conception date based on your due date a dob or your last menstrual period.
Conception date calculation we assume that the estimated due date is 40 weeks from the first day of the last period in your pregnancy calculation and that the conception occurs two weeks into your menstrual cycle.
You shouldn t be embarrased to discuss this with your doctor.
If your menstrual cycle length is the average length 28 day cycle your menstrual cycle probably started about two weeks before you conceived.
And that s how most healthcare providers do it.