Читать книгу Getting Pregnant For Dummies - Sharon Perkins - Страница 48

Cycles that are very long, over 35 days apart, can indicate that you’re not ovulating regularly. This can be a factor of excessive exercise, weight change, or other factors, but it can also be caused by polycystic ovary syndrome, or PCOS. PCOS can cause changes in hormone ratios that can be diagnosed by your doctor, as well as physical changes such as excessive hair, weight gain, and acne. (See Chapter 7 for more on PCOS.)

Endometriosis, premature ovarian insufficiency (see Chapter 7 for more on both of these), abnormal thyroid levels, or high prolactin levels (see Chapter 11 for the details on diagnosing infertility causes through blood tests) can also cause irregular or absent periods.