1. How transvaginal sonography is done;Timor-Tritsch,1988
2. Transvaginal Sonographic Assessment of Early Embryological Development;Blumenfeld,1988
3. Correlation of ultrasonic and endocrinologic assessment of human follicular development;Hackeloer;Am J Obstet Gynaecol,1979
4. Transvaginal sonographically controlled ovarian follicle puncture for egg retrieval;Dellenbach;Lancet,1984
5. Ultrasound guided aspiration of human ovarian follicles for in vitro fertilization;Feichtinger,1986