How did ovulation disorder occur

Patient's question:

Got married for 2 years without having children. The other day, I went to the hospital with a friend for a thorough check-up. The result said it was ovulation disorder. Please ask how does ovulation disorder occur

Doctor's answer:

Causes of Ovulation Disorders:
Luteal Phase Defect: The corpus luteum is formed from the mature ovum after the follicle is released. Poor luteal function is often due to the inadequate development of its precursor, the "follicle." If the follicle fails to develop properly until menopause, a lack of granulosa cells within the follicle can lead to infertility.
Hyperprolactinemia: Prolactin (PRL) is a hormone secreted by the pituitary gland, an endocrine structure in the brain. Elevated prolactin levels can impair follicular development in the ovaries, resulting in insufficient estrogen production and failure to ovulate, leading to infertility.