tethysea - start of your last menstrual period, the first day of last menstrual period. u can calculate your est due date here:
http://www.perinatology.com/calculators/Due-Date.htm
But when u go for scan a more accurate EDD will be furnished. That time when I calculated I should be on week 7 but gynae said I was in week 6 saying probably O late. So all online calculator can only served as a guide.
http://www.perinatology.com/calculators/Due-Date.htm
But when u go for scan a more accurate EDD will be furnished. That time when I calculated I should be on week 7 but gynae said I was in week 6 saying probably O late. So all online calculator can only served as a guide.