Hi and welcome to HCM Duphaston contains dydrogesterone, a progesterone. progesterone is not approved for use during pregnancy in any advanced country such as US, UK etc. Some authorities in the past used to recommend its use in recurrent miscarriage or threatened abortion but now there is now no evidence of any benefit from such practice and recommend against the use in early pregnancy unless there is proven deficiency. One problem with this medicine is that female baby may suffer from hirsutism (unwanted hair on face, chest etc). Therefore if at all progesterones have to be given when there is documented deficiency, it is preferable to give dydrogesterone (sold as Duphaston) which your doctor has prescribed or medroxyprogesterone (sold as Meprate). Most of the times these tablets are prescribed only during first three months of pregnancy. I advice you to have second opinion from another doctor on this. if you have history of previous abortions and current pregnancy in under risk of miscarriage then they might continue duphaston. But please take second opinion. Regards Dr Santosh