Women who gave birth vaginally transferred the unique mix, their unique "community" of vaginal bacterial to the newborn baby.

VOA: standard.2010.06.30

They started something that you may have heard of called The Baby Boom, so the birth rate shot way up and everyone wanted a home.

你们应该听说过那时候开始的,所谓的婴儿潮,出生率激增而且每个人都想要一套房子

耶鲁公开课 - 金融市场课程节选

They started something that you may have heard of called The Baby Boom, so the birth rate shot way up and everyone wanted a home.

你们应该听说过那时候开始的,所谓的婴儿潮,出生率激增而且每个人都想要一套房子

耶鲁公开课 - 金融市场课程节选