Public health interventions are increasingly incorporating mobile health (mHealth) approaches using short message service (SMS) technology in low-income countries, approaches that have demonstrated benefit among various reproductive health outcomes. The investigators hypothesize that personalized, bidirectional SMS dialogue with individual women and couples will increase postpartum contraceptive uptake, thereby decreasing unmet need for family planning in Kenya. The investigators have collaborated with the University of Washington (UW) Department of Computer Science and Engineering (CSE) along with Kenyan telecommunication providers to develop a hybrid messaging system that allows for innovative bidirectional SMS messaging. This system has been used successfully in maternal child health (MCH) clinics in Kenya. In qualitative research, women in Kenya have expressed a strong desire for mHealth support to provide additional education, counseling and reminders to supplement counseling by health workers.