我们抽取出生于1892年至1956年的妇女作为样本，从中发现了明显的自然选择因素并预计如果这个过程能持续十代人的话，妇女的身高将比现在矮两公分，而她们生下第一胎的时间也会提前5个月。
The women were born between 1892 and 1956. We found significant selection and projected that if it continued for ten generations, the women would evolve to be about two centimeters shorter and have their first child about five months earlier.