On 14th day of cycle follicular size of 17-18 mm diameter is a good predictor.
actually endometrium thickness is also have role to get pregnant ,which you have not mentioned .
non visualisation of left ovary is not a big problem.
Better you take ovulation induction
drug from 5th day of cycle for 5 days. That can improve follicular size as well as chances of getting pregnant.
You are welcome for any querry.