Patients need egg donors for a variety of reasons, the most common being age related or same sex couples need an egg donor and gestational surrogate to fulfill their dreams of being parents. Sometimes however, the need for an egg donor stems from cancer treatment, premature ovarian failure, or genetic abnormalities that were present from birth. As a woman gets older (usually around age 40 but sometimes earlier), ovarian function begins to decline and egg quality becomes such that a viable pregnancy and baby will not result. A woman may still be having regular menstrual cycles, but the eggs that are present are of such poor quality that the only way to successfully reproduce is by using eggs obtained from a younger person (usually less than 34). However, it is sometimes difficult to know if a patient can reproduce with her own eggs. Doctors use tests that screen for ovarian reserve to help with this determination. Success rates from treatments with the assisted reproductive technologies are usually determined by the age of the egg provider. A woman who is younger than 34 years of age will have a much higher success rate than a woman older than 35. After age 40, success rates with In Vitro Fertilization decrease dramatically.