Construction of a Multi-dimensional Risk Assessment System: a Clinical Study of Polycystic Ovary Syndrome Complicated With Thrombophilia

Inclusion Criteria:

* Female participants aged 14 to 45 years
* Diagnosis of polycystic ovary syndrome (PCOS)
* For adult participants, PCOS diagnosed according to the 2023 international evidence-based guideline. After exclusion of related disorders, diagnosis is based on ovulatory dysfunction and/or irregular menstrual cycles together with clinical hyperandrogenism, biochemical hyperandrogenism, or polycystic ovarian morphology on ultrasound where appropriate
* For adolescent participants, PCOS diagnosed according to adolescent-specific recommendations. After exclusion of related disorders, both ovulatory dysfunction and/or irregular menstrual cycles and clinical or biochemical hyperandrogenism are required
* Irregular menstrual cycles are defined as follows: more than 1 year and less than 3 years after menarche, menstrual cycles shorter than 21 days or longer than 45 days; more than 3 years after menarche to perimenopause, menstrual cycles shorter than 21 days or longer than 35 days, or fewer than 8 cycles per year; any cycle longer than 90 days more than 1 year after menarche; or primary amenorrhea by age 15 years or more than 3 years after thelarche
* No use within 3 months before blood sampling of anticoagulant drugs, procoagulant drugs, oral contraceptives, or other medications that may affect sex hormones, insulin, glucose metabolism, or coagulation function

Exclusion Criteria:

* Confirmed pregnancy
* Hematologic disease
* History of malignant tumor
* Use of medications within 12 weeks before enrollment that may interfere with study assessments
* Disorders that may cause hyperandrogenism or ovulatory dysfunction, including congenital adrenal hyperplasia, Cushing syndrome, functional hypothalamic amenorrhea, thyroid disease, hyperprolactinemia, or primary ovarian insufficiency
* Disorders that may affect protein C or protein S levels, including antiphospholipid syndrome, liver disease, or tumor-related conditions
* In adolescents, polycystic ovarian morphology alone will not be used to establish the diagnosis of PCOS