“…In the other seven studies, the participants were from specific groups of breastfeeding mothers, including primiparous mothers, mothers with preterm infants, primiparous African American mothers, mothers who exclusively expressed breast milk and ones who continued breastfeeding over 12 months of the child's age (Black et al, 2020;Clapton-Caputo et al, 2020;Jackson & Hallam, 2020;Niela-Vilén et al, 2015;Niela-Vilén et al, 2016;. The breastfeeding peer support groups in 10 studies were exclusively on Facebook (Black et al, 2020;Bridges, 2016;Cavalcanti et al, 2019;Clapton-Caputo et al, 2020;Niela-Vilén et al, 2015;Niela-Vilén et al, 2016;Skelton et al, 2018Skelton et al, , 2020. The groups in the remaining four studies were from forums in parenting websites or unspecified social media groups (Alianmoghaddam et al, 2019;Herron et al, 2015;Jackson & Hallam, 2020;Regan & Brown, 2019).…”