embryology

https://doi.org/10.1351/goldbook.10649

Science of the origin and development of the organism from fertilization of the oocyte to the beginning of fetal life (in humans, the end of the eighth week).

Note: In common usage this term includes all the stages of prenatal life.
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 748 [Terms] [Paper]