■ POR (Poor Ovarian Response)

According to the Bologna of the European Society of Reproductive Endocrinology, corresponding more than two causes below, can be diagnosed as subfertility.

1. Female over 40 years old
2. harvested ova under 3
3. abnormal ovarian reserve (AMH below 0.5-1.1ng / AFC below 5)

■ POI (Primary Ovarian Insufficiency)

1. Ending of woman’s menstrual cycle before age of 40
2. sudden decrease of ovarian reserve
3. amenorrhea, and estrogen degradation
caused among females with hereditary abnormalities containing damaged ovaries or X chromosome due to autoimmunity