Volume 30 Issue 3, March 2020

The cover image describes a Chinese fairy tale, the “Calabash Brothers”, in which an old man grows calabash seedlings (in vitro spermatogenesis), via germination (mitosis), vine elongation (meiosis), flowering and fructification (spermiogenesis) to produce seven calabash brothers of different colors (fertilization-competent spermatids). See page 244-255 by Yan Yuan et al. for details.