coil spring contraceptive diaphragm

coil spring contraceptive diaphragm

a kind of contraceptive diaphragm in which the flexible metal spring that forms the rim is a coiled, circular spring. The rubber dome of the diaphragm is approximately 3.8 cm deep, and the diameter of the rubber-covered rim is from 55 to 100 mm. Seven sizes, in increments of 0.5 cm, allow the clinician to fit the diaphragm to the individual woman. This kind of diaphragm is prescribed for a woman whose vaginal musculature offers good support, whose uterus is not acutely retroflexed or anteflexed, and whose vagina, neither very long nor very short, has a deeper than usual arch behind the symphysis pubis.