Obese [ body mass index ( BMI ) 30 kg/m ( 2 ) ] , ovulatory , otherwise healthy , women received an OC containing 20 mcg ethinyl estradiol ( EE ) / 100 mcg levonorgestrel ( LNG ) dosed cyclically ( 21 days active pills with 7-day placebo week ) for two cycles and then were randomized for two additional cycles to the following : continuous cycling ( CC , a dose neutral arm using the same OC with no hormone-free interval ) or increased dose ( ID , a dose escalation arm using an OC containing 30 mcg EE/150 mcg LNG cyclically ) .