Mobile OB Wheel lets you calculate following dates and values:- first day of a woman's last menstrual period,- date of conception,- end of 1st trimester,- end of 2nd trimester,- expected date of delivery,- weeks gestational age.Fill in one of above mentioned values to calculate the rest.Change of examination date lets you calculate weeks gestational age for picked date.App works basing of Naegele's rule - expected date of delivery is exactly 280 days after woman's last menstrual period. Little variations are possible.Recent changes:Fix for WGA (weeks gestational age)Content rating: Everyone