ESHRE consensus on the definition of ‘poor response’ to ovarian stimulation for in vitro fertilization: the Bologna criteria - Ferraretti, A P; La Marca, A; Fauser, B C; Tarlatzis, B; Nargund, G; Gianaroli, L (Hum Reprod, 2011)
; ESHRE working group on Poor Ovarian Response Definition.