What once was called embryology played a modest role in the evolutionary synthesis, mostly about evolution by changes in developmental timing (allometry and heterochrony).

• 过去被称为胚胎学的学科在进化综合论中只发挥了有限的作用，其中大部分是关于发育时间安排的变化产生的进化（异速生长和异时性）。