What Are The Chances Of Pregnancy After An Abortion?

Hello Docs, I am 28 yr old and its been 2 and half yr of our marriage. I had two missed abortion so we wait for one yr to predict the reason for this abortion as all the other reports are normal. Now we want baby so we go for treatment again. Now my doc suggested heteroscopy and the reports are normal. Now he suggested follicular study along with endogen hp ingestion and progesterone tablets. This is the second month of this cycle, but I don't conceive. Shall I go for third follicular study. I am very nervous as me and my husband want baby.