H. Erskine

In vitro fertilization: diurnal and seasonal variation in luteinizing hormone surge onset and pregnancy rates.

R. Casper, A. Yuzpe, S. Daniel, 1988, Fertility and sterility.

In vitro fertilization: determination of follicular maturation for timing of human chorionic gonadotropin administration**Supported by the Medical Research Council of Canada and University Hospital, London, Ontario, Canada.

R. Casper, D. Armstrong, A. Yuzpe, 1987 .