Is Duphaston necessary?

it depends. if your pregnancy is at risk, the doctor will prescribe for u. other wise you don't really have to take duphaston unless your nausea is affecting your daily life that you aren't able to function normally. otherwise depending on which phase of pregnancy, the nausea should calm down during 2nd trimester where estrogen levels reduce. high estrogen is usually the cause of nausea too, so the progestin in duphaston balances that.