conceptus
noun
con·cep·tus kən-ˈsep-təs 
plural conceptuses also concepti kən-ˈsep-ˌtī
: a fertilized egg, embryo, or fetus
Example Sentences
Recent Examples on the Web Imagine that the conceptus could be exfiltrated from the womb in a matter of minutes, and placed in an artificial womb to develop. 
Michael Brendan Dougherty, National Review, 19 Jan. 2018
Michael Brendan Dougherty, National Review, 19 Jan. 2018 Word History
Etymology
Latin, one conceived, from past participle of concipere to conceive
First Known Use
1745, in the meaning defined above
Medical Definition
conceptus
noun
con·cep·tus kən-ˈsep-təs
plural conceptuses also concepti
-ˌtī
: a fertilized egg, embryo, or fetus