To compare the difference in cumulative live birth rates between dual ovarian stimulation and two antagonist stimulations in poor ovarian responders.
Women with POR were defined with adjusted Bologna criteria, at least two of the three following criteria: advanced maternal age (40 years); 3 oocytes in previous IVF; and antral follicle count (AFC) 5 and/or anti-Mu¨llerian hormone (AMH) 1.1 ng/ml (this criterion was mandatory)
Aged from 20 to 44 years
Body mass index (BMI) from 19 to 32 kg/m2
No more than two previous IVF cycles were recruited
Amenorrhoea
Follicle stimulating hormone (FSH) 20 IU/L or AFC 1
Women with a partner with an extremely severe sperm anomaly or sperm donor use