To keep this from becoming a thing, I'll share what's been said in the Discord: Pregnancy is added in stages so it's often being passively worked on. On the Patreon, Anthaum does roadmap votes for whatever big thing she'll be working on next. Last vote was for Background NPC Simulation, so that's gotta get done before pregnancy can be voted in. Long and short, not until 0.8 comes out is there a possibility of pregnancy being worked on hardcore.
TL;DR- No one has any idea because that's not what's being worked on



