conception

n. thought, idea; formation of a thought; becoming pregnant; embryo

Fertilization (also known as conception, fecundation and syngamy), is fusion of gametes to form a new organism of the same species. In animals, the process involves a sperm fusing with an ovum, which eventually leads to the development of an embryo. Depending on the animal species, the process can occur within the body of the female in internal fertilization, or outside in the case of external fertilization.
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Conception /con·cep·tion/ 1. an imprecise term denoting the formation of a viable zygote.concep´tive 2. concept. con·cep·tion n. 1. [more]Conception - Community and Resources

Noun
1. an abstract or general idea inferred or derived from specific instances
(synonym) concept, construct
(antonym) misconception
(hypernym) idea, thought
(hyponym) conceptualization, conceptualisation, conceptuality
2. the act of becoming pregnant; fertilization of an ovum by a spermatozoon
(hypernym) sexual activity, sexual practice, sex, sex activity
(derivation) conceive
3. the event that occurred at the beginning of something; "from its creation the plan was doomed to failure"
(synonym) creation
(hypernym) beginning
(hyponym) fertilization, fertilisation, fecundation, impregnation
4. the creation of something in the mind
(synonym) invention, innovation, excogitation, design
(hypernym) creativity, creativeness, creative thinking
(hyponym) concoction
(derivation) gestate, conceive, conceptualize, conceptualise

n. conception, design; conceit, idea, notion