1. Humanfertilisy, the basic components;Leridon, H.,1977
2. What to do with the "normal" infertile couple;Southam, A.L.;FertilSteril
3. Long-term prognosis of infertile couples with normal basic investigations: a life-table analysis;Barnea, E.R.; Holford, T.R.; McInnes, D.R.A.;Obstet Gynecol,1985
4. Fertility and infertility statistics: their importance and application;Cooke, I.D.; Sulaiman, R.A.; Lenton, E.A.; Parsons, R.J.;Clin Obstet Gynecol,1981
5. Fertility after discontinuation of intrauterine and oral contraception;Tietze, C.,1968