Osteoporosis risk assessment - FRAX
Breast cancer risk assessment - Gail model

Irregular bleeding is one of the commonest reasons to see your gynecologist. 
Here are tips on what constitutes irregular bleeding.
Bleeding more than 2 weeks
Bleeding between periods
Bleeding more than a pad an hour
And most importantly bleeding after 6 months of no periods (presumed menopause)
Common causes are polyps, fibroids, hormonal fluctuations, endometrial thinning and most serious pre cancer and cancer of the lining of the uterus
Your gynecologist will recommend evaluation by pelvic examination, pap smear, hormone testing, ultrasound and sometimes endometrial biopsy. 
Treatment depends on the condition/cause of the bleeding and most often can be medical management or a minimally invasive or even no cuts procedure with a quick recovery so you can get back to normal in no time.