title: Ascertainment bias and poor responders.
authors: Stephen D
authors: SD
authors: Keay
authors: Julian M
authors: JM
authors: Jenkins
mesh_terms: D000328:Adult; D015982:Bias; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods*; D006801:Humans; D011247:Pregnancy; D018873:Pregnancy Rate; D017211:Treatment Failure