Research Article Cryptorchidism: an apparent substantial increase since 1960. John Radcliffe Hospital Cryptorchidism Study Group. Br Med J (Clin Res Ed) 1986; 293 doi: https://doi.org/10.1136/bmj.293.6559.1401 (Published 29 November 1986) Cite this as: Br Med J (Clin Res Ed) 1986;293:1401 Article Related content Metrics Responses Peer review Related articles No related articles found. Cited by... Gonadal development and reproductive hormones in infant boysAbstract Fulltext PDF