1. New methods of pregnancy testing in adolescent girls;Saxena;Pediatr Clin North Am,1981
2. Hormonal evaluation of early pregnancy;Batzer;Fertil Steril,1980
3. Clinical interpretation of laboratory tests;Widman,1979
4. Early diagnosis of pregnancy;Derman;J Reprod Med,1981
5. How early can pregnancy be detected?;Dahwood;The Female Patient,1983