1. Diagnosis of hydatidiform mole by transabdominal placental biopsy;Alvarez;Fetus and Newborn,1965
2. Chromosome abnormalities in human embryos after in vitro fertilization;Angell;Nature,1983
3. Long-term follow up results after aspiration of chorionic villi during early pregnancy;Anguo,1985
4. Maternal metaphases on direct chromosome preparation of first trimester decidua;Blakemore;Human Genetics,1985
5. A patient's reaction to amniocentesis;Brewster;Obstetrics and Gynecology,1984