Table 1

Text message reminder timings and content

MessageTime since registration
(since first message)
Content
1+21 dayThank you for agreeing to participate in family planning research. Go to the hospital today for your planning appointment.
34 days (+3 days since first message)Present your password at the hospital and receive a health/family planning appointment.
48 days (+1 week)Have you been to your planning appointment yet? The activist will visit again soon.
517 days (+2 weeks)Next visit to hospital, invite a friend to receive family planning services.
622 days (+3 weeks)Family planning allows women to better plan their family.
7+829 days (+4 weeks)Talk to (activist) if you have questions about your health. Thank you for taking part in family planning research.