Letrozol and ovulation induction 


Including intrauterine insemination (IUI), if needed.


At the first day of the menstrual period call us to get an appointment time for the ultrasound. It will be on cycle day__________. Your Doctor will tell you the dose of the Letrozol. If your menstrual bleeding starts on Friday, you can take the first medicine on Sunday and call us on Monday.


Naistentauti- ja äitiysyksikkö

014 269 1023

Monday-Friday 8.00-8.30



Letrozol is a fertility medicine that causes the pituitary gland to release hormones needed to stimulate ovulation (the release of an egg from the ovary). It is used to cause ovulation in woman with certain medical conditions that prevent naturally occuring ovulation.

Usual dose for ovulation induction is 2,5 mg per day (1 tbl), starting on cycle day 3. and using it till 7. day (where cycle day 1 is the first day of the menstrual period, real bleeding). During the first treatment, on cycle day 10.-12. you will have follicular monitoring with vaginal ultrasound. Letrozol can lead to multiple ovulation, increasing the chance of multiple pregnancy. If it looks like there are too many follicles in your ovaries treatment should be discontinued. During that week you shouldn’t have intercourse because of your own safety.

If pregnancy is not achieved next Letrozol course may be started from the next menstrual cycle. For that contact Naistentautien poliklinikka by phone to make a new plans.