Conclusion
In conclusion, we did not find that weekly text-messaging improved 18-month postpartum retention in PMTCT care or linkage to care up to 30 months postpartum. Our results and those of other studies suggest improved retention throughout PMTCT care is likely due to an overall increase in much-needed support mechanisms as part of standard HIV care in Kenya, including the use of both formal and informal telecommunication between patients and healthcare workers.