Randomization, allocation, concealment and blinding
A computer-based program (STATA 14) was used to randomly allocate women to either social media-based health education or usual care group. Randomization allocated women to intervention or usual care in a 1:1 ratio using simple randomization. One of the study investigators (AS) generated the random sequence and emailed to another investigator (KC), who in turn assigned participants to the intervention based on the serial number of recruitments in the random sequence using random sequence number.