Randomization
MP
A random allocation sequence was carried out in blocks of four by a statistician and the results placed in sealed sequentially numbered envelopes and labeled. A perinatal research nurse (MP) generated randomization allocation sequence and assigned participants to view (video group) or not view (non-video group) an animated educational video. An author who enrolled participants (NN) and the counselors, who included standardized and trained obstetrics and gynecology residents and maternal–fetal medicine fellows and staff, were blinded to the randomization sequence.