Following birth , a mother provides a natural food source for the newborn .

胎儿出生之后，母亲向新生儿提供了天然的食物来源。

Previously , scientists thought only small mammals and newborn babies harbored brown fat .

之前，科学家们认为只有小的哺乳动物和新生儿拥有灰色脂肪。

Physical exercise also increases the number of newborn neurons .

体育锻炼也可以增加新生神经元的数目。

The parenting books say the average newborn sleeps about 19 hours a day .

育儿书籍说，一般的新生儿每天大概要睡上19个小时。

In non-human primates such as monkeys , the newborn emerges facing the mother .

对于像猴子这样的非人灵长类，新生儿是面对着母亲出生的。