OBS Calculator- Pregnancy Days Count

This app is designed for counting pregnancy days best for pregnant woman and for gynecologist to instantly count delivery date and pregnancy days count. OBS calculator is easy to use just enter last menstrual period and your are good to go. This app is also good for medical students. Pregnancy calculator is a one touch calculator will provide details about your pregnancy days and also provide you delivery date. So now don't manually count pregnancy and delivery dates.