One of the reasons I know this is that babies whose mothers have 12 or more weeks at home with them are more likely to get their vaccinations and their well checks in their first year, so those babies are more protected from deadly and disabling diseases.
为什么说这些，原因之一是， 那些可以在家陪伴宝宝 12周或者更久的妈妈们， 在孩子一岁前，会更倾向于给宝宝打疫苗， 并且更关注宝宝的健康， 因此这些宝宝们被保护得更好， 不易夭折，也不易患病致残。