Community Health Worker (CHW) interventions are widely used to improve maternal and child health outcomes in developing countries. They are a part of the core child and maternal strategy of World Vision, a Christian relief and development organization operating in nearly 100 countries across the world. World Vision uses CHWs to carry out its timed and targeted counseling (ttC) program, which involves CHWs regularly visiting homes of expectant mothers during pregnancy and also post-pregnancy during the first two years of the baby's life. CHWs provide health information and support to women and invite influential family members, such as husbands and mother-in-laws, to join the counseling sessions. World Vision currently carries out ttC programs in 28 countries, 7 of which have adopted ttC as a national government-led approach to improving maternal, neonatal, and child health outcomes. This paper examines the impact family member involvement in ttC sessions have on maternal health behavior in four countries: Cambodia, Guatemala, Kenya, and Zambia.