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Playing the SVN version right now, no submods, just a few tweaks to history files to play as a Velothi descended Falmer.

I have 105% fertility with the potion and both concubines have 10% fertility. Age of my character is 51 and concubines are 69 and 21. I've tried multiple times to use the console to get them pregnant, a month in the pregnancies disappear.

a Frosty Soul

the Balto-Slav
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There can be 3 reasons for this:
  1. Your concubines are young elves thus their pollination is removed via scripts
  2. Your concubines have a very low fertility, when they get pollinated the scripts remove the pollination
  3. Both 1 and 2
this is what I've gathered from EK Discord.


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It's really only one script which is located inside on_actions and only affects pregnancies that have already started, so male fertility plays no role in it by that point and it's also why cheating in pregnancies won't help. Female fertility on the other hand has a big impact, as does general health, negative/positive traits, number of existing children and of course the age. The 2nd concubine at 21 won't be able to have children, the other one has a low chance of having one. The optimum age for a female mer to have children is between 100 and 200 approximately.