Why Are Susten Injection And Tablets Given Post US Result Of Missed Cardiac Activities In Fetus?

Hi, I m 24 year I have 8 week pregnancy in ultrasound it shows that fetus don t have cardiac activities so doctor is giving susten 200 injection,FOL123 tablets along with susten 200 tablets may I know what purpose it given and I should have continued pregnancy or it should be aborted. Thanks Please help me to know.