| 合子 | he2 zi3 | zygote (fertilized cell in embryology) |
| 胚层 | pei1 ceng2 | germ layer |
| 中胚层 | zhong1 pei1 ceng2 | mesoderm (cell lineage in embryology) |
| 外胚层 | wai4 pei1 ceng2 | ectoderm (cell lineage in embryology) |
| 胚胎学 | pei1 tai1 xue2 | embryology |
| 内胚层 | nei4 pei1 ceng2 | endoblast |
| 神经管 | shen2 jing1 guan3 | neural tube (embryology) |