The need for ovarian reserve cannot be undermined in achieving pregnancy. It refers to the number of viable eggs present in a woman’s ovaries which can produce babies. Certain factors like old age, medical conditions and treatment can cause a decline in ovarian reserve. Apart from the obvious causes of infertility, only ovarian reserve can be deemed as an accurate predictor of a woman’s ability to conceive. It is also crucial in defining the dosage and type of fertility medications used in ovarian stimulation for fertility treatments.