Hello i am trying to concieve since last 3 months. my doctor has prescribed me letroz from day 2 of cycle. on day 12, my follicle grows more than 20 mm as seen on follicular study and i have to get hucog 5000 injection. my query is that is it important to get follicular study every month or can i simply get a hucog injection on day 12? (as my previous cycles show that follicle grows more than 20 mm by day 12). pls guide.