A descriptive observational epidemiological study based on the 2002-2012 primary records of Omsk Antenatal Clinical One was conducted to estimate the number of new cases of cervical intraepithelial neoplasia (CIN). There was a rise in primary morbidity from CIN (increment rate +7.9% according to referrals; p<0.001). A dynamic change was found in the pattern of CIN grades: a predominance of CIN I (45.7%) over CIN II (37.0%) and CIN III (17.8%), an increase in CIN I (increment rate +7.4%; p<0.001). There was a considerable alteration in the age pattern of CIN toward the preponderance of diseases in 18-35-year-old patients (increment rate +11.3; p<0.001). Over 2002-2012, the average long-term primary morbidity (incidence) from CIN was 82.5±3.6 per 100,000 female population. The epidemiological findings suggest that there is a considerable change in the epidemiological situation associated with CIN morbidity over 10 years.