Participants’ selection
First, health centers with functional MWHs were identified based on an assessment criteria adopted from national MWH guideline (We used census and health post records to identify eligible pregnant women and then their male partners. It was after we identified the pregnant women that we traced their partners. Health professionals in collaboration with extension workers collected the data and identified the pregnant women. The women were asked their Last Menstrual Period (LMP) to estimate the gestational age and determine their eligibility. Women who were in the beginning of second trimesters (14–16 weeks of gestation) were listed. This list was used as a sampling frame. Then, the participants were recruited from each cluster using simple random sampling technique.Informed consent was obtained at the cluster level as well as at individual level. The study participants signed an informed consent to ensure their voluntary participation. The survey questionnaires included questions regarding sociodemographic characteristics, knowledge about MWHs, and attitudes toward MWHs (