References
- Hotchkiss R S. Factors in stability and variability of semen observations on 640 successive samples from 23 men. J Urol 1941; 45: 875–888
- James W H. Secular trend in reported sperm counts. Andrologia 1980; 12: 381–388
- Lincoln G A. Cyclical and seasonal changes in human testicular activity. J Reprod Fert 1973; 33: 365, (abstract title only: data presented in ref. 4)
- Lincoln G A. Seasonal aspects of testicular function. The Testis, H Burger, D M de Kretser. Raven Press, New York 1981; 255–302, chap 12
- MacLeod J, Heim L M. Characteristics and variations in semen specimens in 100 normal young men. J Urol 1945; 54: 474–482
- MacLeod Wang J.Y. Male fertility potential in terms of semen quality: A review of the past, a study of the present. Fertil Steril 1979; 31: 103–116
- Mortimer D, Templeton A A, Lenton E A, Coleman R A. Semen parameters and their interrelationships in suspected infertile men. Arch Androl 1981; 8: 165–171
- Rehan N-E, Sobrero A J, Fertig J W. The semen of fertile men: Statistical analysis of 1300 men. Fertil Steril 1975; 26: 492–502
- Reinberg A, Lagoguey M, Chauffournier J-M, Cesselin F. Circannual and circadian rhythms in plasma testosterone in five healthy young Parisian males. Acta Endocrinol 1975; 80: 732–743
- Smals N H, Kloppenborg P WC, Benraad T J. Annual cycle in plasma testosterone levels in man. J Clin Endocrinol Metab 1976; 42: 979–982
- Templeton A A, Penney G C. The incidence, characteristics, and prognosis of patients whose infertility is unexplained. Fertil Steril 1982; 37: 175–182