Conception
Part of speech: noun
Definition: The act of conceiving. The state of being conceived; the beginning. The fertilization of a human ovum by a sperm to form a zygote. The start of pregnancy. The formation of a conceptus or an implanted embryo. The power or faculty of apprehending of forming an idea in the mind; the power of recalling a past sensation or perception; the ability to form mental abstractions. An image, idea, or notion formed in the mind; a concept, plan or design.
Inception
Part of speech: noun
Definition: The creation or beginning of something; the establishment.