Most commonly, what is seen in patients with polycystic ovary syndrome?

In patients with polycystic ovary syndrome (PCOS), irregular menstruation is the most commonly observed symptom. This condition is characterized by hormonal imbalances that can disrupt the normal menstrual cycle, leading to anovulation and, consequently, irregular or missed periods. The presence of multiple cysts on the ovaries, along with symptoms such as hirsutism, acne, and weight gain, further contributes to the irregularity of menstrual cycles.

Regular ovulation is not typically associated with PCOS, as many individuals with the condition experience difficulties in ovulating regularly. Increased hCG levels are not characteristic of PCOS; elevated hCG is more commonly associated with pregnancy or certain tumors. Cervical incompetence is a condition related to the inability of the cervix to maintain a pregnancy and is not inherently linked to PCOS.

All these aspects highlight why irregular menstruation is the hallmark symptom of PCOS, making it the most relevant choice in this context.