Dating a pregnancy without periods
Gestational age is calculated from the first day of the mother’s last menstrual period and not from the date of conception.The baby can be measured as early as 5 or 6 weeks after the mother’s last menstrual period.It is actually quite rare that you will give birth on your due date.You should only use your due date as a guideline, such as “I am due sometime around the end of June”, or “I’m due near Christmas”.
Your estimated due date will be 40 weeks from that day.
Your due date is an average of 266 days from the day you conceive.
This is an alternate way to figure out your due date if you don’t know the first day of your last menstrual period.
When I went to the doctor I had no idea what to tell them when they asked how far along I was.
Because of this, we did an ultrasound and a due date was set.
These ultrasounds came in handy the next two pregnancies as well.