Table 1

Timeline of intervention and information collection

Time point	Enrolment and allocation	Post-allocation			Delivery	Postpartum
Time point	Before 11 weeks	11–12 weeks	24–26 weeks	34–36 weeks	Delivery	42 days postnatal	3 years postnatal
Enrolment	√
Eligibility screen	√
Informed consent	√
Allocation	√
Interventions
OEA		√	√	√
POA		√	√	√
RAC		√	√	√
Assessments
Baseline data
Demographic		√
Current pregnancy health			√
Diet Assessment (FFQ), Questionnaire		√	√	√		√	√
Pregnancy nutrition checklist		√	√	√		√	√
TPB-Q		√	√	√		√	√
IPAQ, PSQI		√	√	√		√	√
Child Feeding and Development, early care, sleep and activity						√	√
Primary outcome
LGA, GDM					√
Second outcome
Mantel pregnancy outcome (mode of delivery, pregnancy complications and GWG, etc)					√
Fetal outcome (birth weight, placenta weight, SGA, preterm, Apgar score, etc)					√
Infant length and weight						√	√

FFQ, food frequency questionnaire; GDM, gestational diabetes mellitus; GWG, gestational weight gain; IPAQ-S, International Physical Activity Questionnaire - Short Form; LGA, large-for-gestational age; OEA, online education arm; POA, pregnancy nutrition checklist and ‘one-page flyer’ arm; PSQI, The Pittsburgh Sleep Quality Index; RAC, routine antenatal care; SGA, same gestational age; TPB-Q, Theory of Planned Behaviour Questionnaire.