Hormone tests help determine treatments for fertility problems. The upper and lower limits of AMH and FSH hormone tests are not where your fertility falls off a cliff. Instead, these limits determine the probable outcome of medical treatment to work.
FSH
By Advanced Fertility Solutions Female Fertility IVF and Beyond Low AMH
AMH and FSH levels determine how well IVF drugs will grow good eggs. Women with high FSH and low AMH levels respond poorly to IVF drugs. They have the smallest chance of success with IVF. To date, no IVF hormone therapy has been able to lower FSH levels or raise AMH levels.