Primiparity, older maternal age, COVID-19 pandemic, twin birth, and winter birth are associated with lower exclusive breastfeeding in Japanese mothers. - Zain, Ekachaeryanti; Watanabe, Yuichiro; Fukui, Naoki; Hashijiri, Koyo; Motegi, Takaharu; Ogawa, Maki; Egawa, Jun; Nishijima, Koji; Someya, Toshiyuki (Scientific Reports, 2025)