conception

https://doi.org/10.1351/goldbook.10550

Formation of a viable zygote by the union of a spermatozoon and an ovum.

See also: fertilization
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 738 [Terms] [Paper]