IRCT2015081123590N1 IRCT 2015-09-25 Tarbiat Modares University The effect of sex education package on sexual function of nulliparous pregnant women in the first trimester Assessing the effect of sex education package on sexual function on nulliparous pregnant women in the first trimester 2014-05-10 anticipated 100 Complete https://irct.ir/trial/20104 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Health service research. N/A Sex education in pregnancy. Intervention 1: Intervention group: implementation of a sex education package. At first, group education will be conducted in groups with 8-10 women in the selected prenatal centers in two sessions, approximately sixty minutes each session, once a week for two consecutive weeks. One of the research team members, a midwife with special education in sexual health in pregnancy, will teach at the sessions using an educational book and compact disk Compiling by the research team. The book and compact disk will be given to the pregnant women at the end of the first session. The women will be asked to study the book (themselves and their husbands) till the second educational session and ask their questions in the session. The subjects and their husbands in the interventional group can also get telephone counseling about sexual health. Intervention 2: Control group: Routine prenatal care.