This educational handbook on “Preventing Gender-biased Sex Selection by Creating a More Responsible Attitude of Medical Workers and Improving their Counselling Skills” was developed by a team of experts of the National Institute of Health named after academician Suren Avdalbekyan CJSC managed by the Ministry of Health of the Republic of Armenia (from now on will be referred to also as the Armenia National Institute of Health). It was developed within the framework of the “Addressing Gender Biased Sex Selection and Related Harmful Practices in the South Caucasus: Support for Regional, National and South-South Interventions” project implemented by the UNFPA in partnership with the OxYGen Foundation. The Project is funded by the European Union and UNFPA.