1. Recurrent spontaneous abortion;Stirrat,1992
2. Terminological conventions, methodological considerations, temporal trends, specific genes, environmental hazards and some other factors pertaining to embryonic and fetal deaths;Hook,1980
3. Very early pregnancy;Kline,1985
4. Chromosome abnormalities: origin and etiology in abortions and livebirths;Jacobs,1987
5. Fetal loss rates and their relation to pregnancy order;Roman;J Epidemiol Community Health,1984