Having numerous possibilities or implications; full of promise; abounding in ability, resources, etc.
Of a couple: expecting a baby together.
Fertile, prolific (usually of soil, ground, etc.).
Carrying developing offspring within the body.
A pregnant woman.
Having a noticeable or major effect.
Reasonably large in number or amount.
Having a low probability of occurring by chance (for example, having high correlation and thus likely to be related).
Having a covert or hidden meaning.
Signifying something; carrying meaning.
That which has significance; a sign; a token; a symbol.