letrozole 2.5 mg twice a day for pregnancy?

Can I take letrozole 2.5 twice a day?
Letrozole Dosage for Infertility

The recommended starting dose of letrozole to induce ovulation is 2.5 mg once a day for 5 days, beginning between days 2 and 5 of menstrual bleeding. The medicine can be taken at any time during the day, but it should be taken at the same time each day.

How effective is letrozole 2.5 mg for fertility?
According to a study on a group taking Letrozole, the average time to get pregnant was 90 days. That is about three cycles. Within that time, 28% of the women in the letrozole study gave birth.