过渡时期

Adolescence is the period of transition between childhood and adulthood.

青春期是童年与成年之间过渡时期。

The Panopause is a transient period for women that the functions of ovarium are declining little by little and even totally eliminate.

围绝经期是妇女卵巢功能逐渐衰退、直至完全消失一个过渡时期。