Even if they are still in good shape and look young on the outside, on the inside their bodies-much to their frustration-have started to change according to a timetable set by millions of years of human evolution. They are no longer like women in their 20s who can bring forth healthy eggs at any time to create a new life.
即使外貌看起來年輕、體力也維持在極佳狀態，無奈身體內部卻依照人類千萬年來的演化腳步兀自老化，再也沒辦法像二十幾歲的年輕人，隨時提供品質健康的卵子來孕育新生命。