卵块

hatchability of fertile egg

egg

egg-spoon

egg white/protein/albumen

egg envelope, egg membrane

egg penetration test; 人精子穿入脱透明带的金黄地鼠卵子的试验。

egg case【无脊椎】;egg sac【无脊椎】;oocyst【无脊椎】

ripe egg stage