Table 5.

Characteristics of the selected studies for the meta-analysis of the secondary outcomes

Study	Study	Population	Comparison	Intervention	Selected outcomes
1. Abbass-Dick 2015 [78]	Canada, Randomized controlled trial	Primiparous mothers with a singleton birth, 18 or more years old, term delivery, with a male partner	1. Intervention group (107 couples) 2. Control group (107 couples)	Face to face intervention of approximately 15 minutes. Could refer to materials like workbook, video and a website later	-Support of fathers: Intervention group- 71%, Control group- 52%
2. Raeisi 2014 [75]	Iran, Interventional study	Mother in second trimester, no pregnancy complication or underlying disease	1. Intervention group (Group A) – 50 couples 2. Control group (Group B)- 50 couples	Three training sessions including brochures	-Support of fathers: Intervention group-94%, Control- 60% -Knowledge of mothers Intervention group-103 points, Control- 95.71 points
3. Maycock 2013 [76]	Australia Randomized controlled trial	Mother must be more than 18 years, father must be contactable living in Western Australia and willing to involve in child rearing	1. Intervention group- 358 2. Control group-298	Two hour antenatal health education session and a postnatal social support package including printed materials.	-Full formula feeding at six weeks: Intervention group-18.4%, Control- 24.8%
4. Susin 2008 [77]	Brazil, Controlled clinical trial	Couples living in the city of Porto Alegre, infants have no health problems, birth weight equal to or more than 2500 g, have initiated breastfeeding	-Control group (no intervention)- 201 -Intervention group with mother- 192 -Intervention group with both mother and father- 193	Health education session with a 18-minute video and a discussion, an explanatory handout was provided	-EBF at four months: Intervention group with mothers- 11.1%, Intervention group with both mother and father-16.5%