Why Is Endogest Vaginal Tablet Prescribed For The Lack Of Heart Beat In Fetus?

I am 24 yr girl i conceived on november 22nd , 2010 and on 25 Dec it was diagnosed by the doctor. I rushed to the dr with severe pain in stomach. Doctor advised for ultrasound. In u/s the the size of the foetas was shown 15 * 15 mm, without heartnod after one month of pregnancy. Doctor prescribed Endogest 200 a capsule vaginally What, why how