Inter-pregnancy interval and pregnancy outcomes among women with delayed childbearing: protocol for a systematic review

Table 1 Search strategy

Database	Search term
Medline	Subject heading (MeSH): Birth interval
	Keywords: “birth interval” or “pregnancy interval” or “birth spacing” or “pregnancy spacing” or “interpregnancy interval” or “interpregnancy spacing”
	Birth adj3 Interval
CINAHL	Subject heading (MeSH): Birth interval
CINAHL	Keywords: “birth interval” or “pregnancy interval” or “birth spacing” or “pregnancy spacing” or “interpregnancy interval” or “interpregnancy spacing”
Embase	Keywords: “birth interval” or “pregnancy interval” or “birth spacing” or “pregnancy spacing” or “interpregnancy interval” or “interpregnancy spacing”
Embase	Birth adj3 Interval

ISSN: 2046-4053