Cluster 689: childbearing potential female contraception non subjects use women females willing 
Cluster 876: effective contraception childbearing potential use highly study dose agree months 
Cluster 1219: fcbp females childbearing pregnancy potential agree testing ongoing practice contraception 
Cluster 1246: dose study contraception adequate days use participants potential childbearing method 
Cluster 1653: partner female potential childbearing contraception use effective vasectomy agree men 
Cluster 1799: study men duration agree contraception participation adequate pregnant use completion 
Cluster 2270: contraception childbearing women potential men adequate use agree practice study 
Cluster 2347: bearing child potential contraception use women effective agree study men