conception

/kənˈsɛpʃən/

ot noun

The act of conceiving.
The state of being conceived; the beginning.
The fertilization of an ovum by a sperm to form a zygote.
The start of pregnancy.

Manbalar: Wiktionary (Free Dictionary API orqali), Datamuse, Tatoeba (CC BY 2.0 FR), MyMemory.