The "Preg odds" toggle seems to be bugged, or maybe I'm mis-understanding it. Seem like when I have it "ticked" it just sets the chance to 0 (or I have REALLY bad luck), but when I turn it to what looks to be "off" I have a 100% success rate???
That's a first for me. Tried now with Natalie. Enabled it & had her knocked up even before finishing the events.
Might be character & scene specific. Who's your target and what repeat are you doing?