What are the factors or causes of female infertility? Can it be cured?

Patient's question:

Got married for almost two years, still not pregnant, maybe it's infertility

Doctor's answer:

Infertility is defined as the inability to conceive after one year of unprotected intercourse. Suggestions: 40% of cases involve women, 30-40% involve men, and 10-20% involve both. Relevant tests are needed to clarify the situation. Tubal diseases are more common in women, while abnormal semen is more common in men. It is necessary to identify the specific condition to determine whether it can be treated.