title: With many thanks to Henry Leese.
authors.affiliation: Academic Unit of Reproductive and Developmental Medicine, School of Medicine and Biomedical Sciences, University of Sheffield , The Jessop Wing, Sheffield, S10 2SF , UK.
authors.forename: Allan A
authors.initials: AA
authors.lastname: Pacey
mesh_terms: D005298:Fertility; D006801:Humans; D010506:Periodicals as Topic