The high prevalence of risky sexual behavior and distorted reproductive attitudes disrupt the development of reproductive health and limit reproductive function. Studies of the physical health of adolescent girls have significant prognostic value for assessing reproductive health. The concept of «sexual dimorphism» reflects natural expediency - the most optimal mechanism for reproduction, when copying occurs at the genetic level, the possibility of biological control, the rejection of unfavorable species traits, and the selection of more favorable ones. The extent to which certain forms of sexual behavior correspond to the nature of human sexuality must be analyzed, as any discrepancy can impact the health and fate of children. Risky sexual activity (RSA) is a learned form of sexual behavior, but a constitutional predisposition is a necessary condition for its occurrence. A prenatal abnormal androgen environment may be associated with a higher risk of non-heterosexual preferences and sexual orientation choices. Many scientists believe that constitutional and biological factors play a role in the development of risky sexual activity, including non-heterosexual behavior, although the specific mechanisms are still under investigation.

The aim of the work is to characterize the main anthropometric indicators and indices of adolescent girls with menstrual disorders and different types of commitment to risky sexual activity.

Material and research methods: The results of a study examining the peripheral reproductive system of 257 sexually active minors - NH RSA (n=89) with an exclusively and predominantly same-sex preference when choosing a potential partner and H (n=168) with exclusively heterosexual contacts, with a gynecological age of at least two years who had menstrual disorders will contribute to the resolution of theoretical and practical issues related to the manifestation of sexual morphofunctional dimorphism, a personalized approach to the treatment of menstrual disorders, and the rehabilitation of minor female patients in the target group. Statistical processing of data was carried out using the standard package of generally accepted software Microsoft Office Excel (2007) and a specialized package for statistical data analysis «STATISTICA 8.0» (StatSoft, Inc., USA).

Results of the study: every second patient with menstrual disorders and adherence to NH RSA in comparison with H RSA had a longer existence of menstrual disorder (p, since they began with menarche (36.0 versus 6.6%), the age of which was earlier [11.0 (95% CI 10.1-11.6) versus 11.2 (95% CI 10.0-12.7)], in the absence of signs of estrogenization, being a symptom of inverted puberty; a tendency towards «masculinization» with a possible state of immaturity of morphological structures reflecting the retardation of biological maturation was established, confirmed by a reliable difference in the structure of sexual dimorphism according to the andromorphic type (16.8 versus 10.8%) and a strong sexual constitution (26.7 versus 11.1%). Energy instability was noted in the form of a pronounced deficit of body weight (25.84 versus 8.9%) in women with the gynecomorphic type and overweight (32.58 vs. 17.26%), predominantly in those with the mesomorphic type with confirmed abdominal obesity (65.1 vs. 39.9%) and the maximum perineal anthropometric indicator of the vaginal-anal distance (4.50±0.15 vs. 3.49±0.18) in those with the brachymorphic type.

In the future, the obtained data will allow for a deeper understanding of the pathogenesis of gynecological health disorders in each specific case, individualize therapy, and develop a more precise plan for preventive activities and rehabilitation of underage patients in the target group. In the future, the obtained data will allow for a deeper understanding of the pathogenesis of gynecological health disorders in each specific case, individualize therapy, and develop a more precise plan for preventive activities and rehabilitation of underage patients in the target group.

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