How should patients understand the reasons for anovulation?

Patient's question:

Patient Age: 25
Patient Gender: Female
Married and trying to conceive for 1 year without pregnancy, diagnosed with infertility. How should the patient understand the cause of anovulation?

Doctor's answer:

Factors that can cause ovulatory dysfunction include: central nervous system amenorrhea, hypothalamic amenorrhea, pituitary amenorrhea, ovarian amenorrhea, polycystic ovary syndrome (PCOS), and luteinized unruptured follicle syndrome. Additionally, endocrine disorders such as thyroid and adrenal cortex dysfunction, as well as some systemic diseases (e.g., severe malnutrition), can affect ovarian function adjustment, leading to ovulatory dysfunction and manifesting as conditions such as PCOS, hyperinsulinemia, hyperprolactinemia, premature ovarian failure, and luteinized unruptured follicle syndrome.