Follicle size

Hi! I m 36. Ttc for # 1 for one year after going through a miscarriage last year.on 4th round of letrozole.today got follicles scan on cycle day 11 measuring as follows

Left ovary: 3 dominant follicles

23 mm

20 mm

18 mm

Right ovary dominant follicle

4 mm

What r my chances n what should be done next. Any insights?