The results of the HSG test provide a good model for how our nonsurgical permanent contraception method might work. The investigators think that if the tubes are not patent, that our treatment will not work as well. Therefore, in this study we want to learn if menstrual cycle timing or current hormonal contraception use will affect the patency of the tubes as assessed by the HSG. The investigators want to examine the same women to see if tubal patency is changes during the menstrual cycle and during the use of a birth control pill and the birth control shot.