Hello, Duphaston is nothing but progesterone
.It actually supplements the progesterone level in the body to maintain pregnancy.As you had history of miscarriage
this drug is given to maintain pregnancy
It is absolutely safe in pregnancy......so dont worry .It doesnt cause birth defects.It has minor side effects likegastro-intestinal disturbances, skin rashes , loss of libido, acne, fluid retention,mental depression
Duphaston should be avoided in cardiovascular, renal or hepatic impairment, diabetes mellitus
, asthma, epilepsy and migraine.
So you consult your doctor for further clarification.take care