(a.) Being or happening before birth.

abecedarian aboriginal antenatal autochthonous beginning budding creative elemental elementary embryonic fetal formative foundational fundamental gestatory in embryo in its infancy in the bud inaugural inceptive inchoate inchoative incipient incunabular infant infantile initial initiative initiatory introductory inventive nascent natal original parturient postnatal pregnant primal primary prime primeval primitive primogenial procreative rudimental rudimentary ur