Which condition is characterized by irregular menstrual cycles, hirsutism, and infertility?

The condition characterized by irregular menstrual cycles, hirsutism (excessive hair growth in areas typically male-patterned), and infertility is Polycystic Ovary Syndrome (PCOS), also known as Stein-Leventhal syndrome. This hormonal disorder is prevalent among women of reproductive age and is marked by an imbalance in reproductive hormones, which can lead to a range of symptoms.

In PCOS, the ovaries may develop numerous small cysts and there is often elevated levels of androgens (male hormones) present. This hormonal imbalance disrupts the normal menstrual cycle, leading to irregular periods. The excess androgens are responsible for hirsutism, causing hair growth in areas such as the face, chest, and back. Additionally, due to irregular ovulation or lack of ovulation, women with PCOS often experience difficulties with fertility.

Other conditions mentioned, such as endometriosis and pelvic inflammatory disease, relate to different reproductive issues and do not inherently result in all three symptoms. Similarly, while thyroid dysfunction can influence menstrual cycles and fertility, it does not typically present with hirsutism as a primary symptom.