There are several ways you can make an educated guess.
There are a few methods for figuring out your date of conception.
The difference between LMP estimates and estimates based on ovulation day or ultrasound was 9 and 12 days, respectively.
A uniform rise in h CG on each day of pregnancy was seen using all reference methods.
The pregnancy due date can be determined by any of the following methods, some that can be done at home by the expectant mother.