Your baby will come soon.
So you need to find a birth-tree.
You can't give birth in camp, because blood draws predators and you'd be putting everyone at risk.
It's winter, so you want an evergreen, one with enough branches to offer good protection from the weather, but not so many that predators can approach unseen.
You'll need a stout trunk to brace against; also lots of absorbent duff to sop up the blood, and a spot to bury the blood-soaked strew. Unburied blood draws danger.
The right tree will also provide dead wood, and you'll need that. Fire warms and protects.
A hemlock on a south-facing slope would be good. That way you'll get the best of what Sun there is.