Study	Reason for exclusion
Bergmann 2008	Excluded because the trial did not report allergy outcome of the infants and/or children.
Campos‐Martinez 2012	Excluded because this trial published as an abstract and did not report allergy outcome of the infants and/or children.
Carlson 2013	Excluded because the trial did not report allergy outcome of the infants and/or children.
Colombo 2004	Excluded because the trial did not report allergy outcome of the infants and/or children.
Courville 2011	Excluded because this trial did not report allergy outcome of the infants and/or children.
Granot 2011	Excluded because the trial did not report allergy outcome of the infants and/or children.
Hauner 2009	Excluded because the trial does not report allergy outcome of the infants and/or children.
Helland 2001	Excluded because the trial did not report allergy outcome of the infants and/or children.
Innis 2007	Excluded because the trial did not report allergy outcome of the infants and/or children.
Judge 2007	Excluded because the trial did not report allergy outcome of the infants and/or children.
Karlsson 2010	Excluded because the trial did not report allergy outcome of the infants and/or children.
Knudsen 2006	Excluded because the trial reported only timing of spontaneous delivery.
Krauss‐Etschmann 2007	Excluded because the trial did not report allergy outcome of the infants and/or children.
Martin‐Alvarez 2012	Excluded because the trial published as an abstract and did not report allergy outcome of the infants and/or children.
Pena‐Quintana 2011	Excluded because this trial published as an abstract and did not report allergy outcome of the infants and/or children.
Ribeiro 2012	Excluded because the trial did not report allergy outcome of the infants and/or children.