Yes, no alteration. Pregnancy was set to 10 days, so I did saw a slave go through the complete ovulation inseminated every day + 10 days from preg and nothing happens.
Viewing post in Aric's Expansion Rebred
There were a lot of changes to fertility in deviates code that I hadn’t noticed that heavily penalize non-standard races on top of the long ovulation timers. I am working to correct those ASAP though and will release a new version with those modifications heavily reworked to keep from penalizing any non-standard race playthrough soon.