Appendix 1. Search terms for ICTRP and ClinicalTrials.gov

WHO International Clinical Trials Registry Platform (ICTRP)

(we ran each line and alternative spelling separately and then de‐duplicated)

GDM AND c(a)esarean

diabetes AND c(a)esarean

diabetic AND c(a)esarean

planned AND birth AND GDM

planned AND birth AND diabetes

planned AND birth AND diabetic

elective AND birth AND GDM

elective AND birth AND diabetes

elective AND birth AND diabetic

induction AND labo(u)r AND diabetes

induction AND labo(u)r AND GDM

Induction AND labo(u)r AND diabetic

expectant AND birth AND GDM

expectant AND birth AND diabetic

expectant AND birth AND diabetes

ClinicalTrials.gov

(we ran each search separately and then de‐duplicated)

Advanced search

1.

diabetes OR diabetic OR GDM ‐ Condition

cesarean OR caesarean – Intervention

2.

diabetic OR diabetes OR GDM ‐ Condition

(planned OR elective OR expectant) AND (birth OR delivery) ‐ Intervention

3.

diabetes OR diabetic OR GDM ‐ Condition

induction AND (labour OR labor)