Hey, My Wife Have A Problem Of Irregular Periods, And

hey, my wife have a problem of irregular periods, and my sperm count result shows less than 5 Million. Our Dr. have suggested us that since the sperm count is too low, their is negligible chance to get a normal pregnancy. He has asked to go for IVF.
We are confused, whether to wait or to go for IVF. ?
Is IVF safe and secure.?