I don't know how it handles futa characters, but pregnancies in general seem to be rare with that module loaded onto all of the female characters. I can count on one hand the number of times I've seen one NPC get another NPC pregnant, and my PC has never gotten anyone pregnant.
i now finally understand the answer to this. The game actually treats Safe days and "Normal" days the same mechanically. the only thing different is the dialog of those npcs. the only days where anyone can ever get pregnant are Dangerous days. this is the same for vanilla and the original preg mod. wearing no condom makes zero difference on normal days.
mechanically, the game simply doesnt keep track of condom vs no condom vag ejacs. they are both recorded to a single variable. only on dangerous days can non condom actions add to a separate variable "Risky Cums"
the new version of preg mod v2 ive updated now, takes this into account and is now designed to work more ideally with npc preg schedules that are almost entirely Dangerous days, and then treat the Normal vs Safe option as a dialog choice for your cards (the safe day dialog might seem more slutty than the normal day dialog) basically i have it curb the math on risky cums to be less mechanicals and more organic. you get away with more free risky cums basically, and there is a cap to how much you can add in one session and the values are sorta on a wobbly curve in this new version
i put it in that zip above but ill wait to update my main post until i have all the readmes and stuff done later this week hopefully