- Women are not breastfeeding. Women with child-bearing potential are using effective contraception (see 9.2.4 and 9.3.5), are not pregnant and agree not to become pregnant during participation in the trial and during the 12 months thereafter. A negative pregnancy test before inclusion into the trial is required for all women with childbearing potential. Men agree not to father a child during participation in the trial or during the 12 months thereafter.