The technique of laparoscopy was modified for use in the rabbit and was found to facilitate continuous observation of follicular development and ovulation. The timing of ovulation was studied and suggests that 100 i.u. HCG, whether used in a superovulation regimen or solely as an ovulatory stimulus, causes a greater ovulation rate than does a mating stimulus. Follicular rupture was observed and frequently occurred in the smaller follicles first. Laparoscopy in pregnant rabbits suggests that quantification of preimplantation blastocysts is not only possible but also very accurate and is without deleterious effects on the developing embryos. These results suggest that the laparoscopic technique may be a valuable asset to the study of reproductive phenomena in the rabbit.