Germinal

Relating to spring
Pertaining, similar, or belonging to a germ.
(botany) Relating to a plant ovary
(figurative) Serving as a point of origin; formative.
(figurative) Highly influential; seminal. (Can we add an example for this sense?)

In sense “highly influential”, primarily used as a consciously feminist alternative to male seminal (germ (“egg”) vs. semen).