in a randomized clinical study , contraceptive efficacy and bleeding patterns were studied in a group of healthy , regularly menstruating , non-lactating women ( n = 84 ) using two 4.4 cm covered silastic rods containing levonorgestrel , norplant ( r ) -2 , and compared with another group of women ( n = 88 ) using six 3.4 cm capsules also containing levonorgestrel , norplant ( r ) .
C0023566
levonorgestrel
C1145675
norplant