Here is 31 year old married woman weight 53 kg , married life of 2 years, had history of missed abortions first at 5 weeks and 2nd at 7 weeks, male partner age 32 years, menstrual cycle is regular and normal 28 days. Laboratory investigations: CBC, TSH are normal, Anti cardiolipin antibodies test negative USG: Fist pregnancy - blighted ovum Second - 7 weeks 4 days, No FHA, No structural abnormalities in fetus with 4D scan seen What might be reason for RPL?

How to go ahead with next pregnancy?