Su 2016.

Methods	Quasi‐randomised controlled trial in rural China
Participants	Participants were local pregnant women at any gestational age; to be included, had to own a cell phone in the household and visit a local maternal and child health centre for antenatal care
Interventions	Four study arms include (1) good household prenatal practice messages (advice on nutrition, exercise, self‐awareness of depression, breastfeeding, etc.), (2) care‐seeking messages (information about government‐subsidised programmes, warning signs of potential problems, importance of care‐seeking during illness), (3) both types of messaging, and (4) a limited set of ‘status‐quo’ messages about pregnancy (control) At baseline, a survey was conducted. Text messages are sent from time of enrolment until delivery, with information related to their week of gestation. A final survey is conducted a month after delivery to assess postpartum depression. Data from medical records are collected at baseline, during pregnancy, at birth, and 1 month after birth for all participants. The group assigned to intervention 1 (good household) and the control group receive 6 reminders with brief information (prenatal visits and hospital delivery). The intervention 2 (care‐seeking) and combination group (3) receives 6 similar reminders with greater detail and 2 additional messages. Text message topics include faetal development, reminders for prenatal visits and hospital delivery, recognition of danger signs, reminders for government‐subsidised projects, healthy lifestyle, mental health during pregnancy, pain management, labour, and breastfeeding; topics and numbers were dependent on the group assignment
Outcomes	Primary outcome: Newborn health measured by appropriateness of weight for gestational age Secondary outcomes: Perceptions of general health and postpartum depression Severe maternal morbidity measured during pregnancy and childbirth through the summary indicator (‘near‐miss’) Severe neonatal morbidity measured by a summary indicator, with the neonatal adverse outcome indicator Psychological outcomes involving 9 dimensions: attitudes, personal norms, self‐efficacy, social desirability, intentions, plans, susceptibility, expectations, and severity Behavioural outcomes including actual number of prenatal visits over expected visits and uptake of government‐subsidised programmes (e.g. duration of folic acid, uptake of infant vaccinations), nutrition, moderate exercise, care‐seeking when ill, and caesarean section
Notes	Currently, only the protocol is available for this study; therefore no results have been published