Hello dear,I understand your concern.In my opinion doctor might havr thought that progesterone insufficiency might have resulted in miscarriages.So microgest which is progesterone hormone is prescribed.Folistar is folic acid vitamin which is must to be taken in first trimester of pregnancy for proper growth of fetus. Obimet Sr is a metformin which also helps in maintenance of pregnancy.loprin is a aspirin to prevent any microclots in placental vasculature to ensure good blood supply to fetus.duvadilon retard helps in relaxation of uterus and avoids any uterine irritability.Dont worry.Most pregnancies continue normally after a series of miscarriages.Avoiding physical and mental stress is very important. Best regards...Dr srilatha