This is a very long shot as I don't remember too much about this series, as I read it after I had a heavy brain concussion.
The setting was a medieval-time fantasy setting, I'm pretty sure there was magic involved. Each book in the series had a different color stone or pendant on the cover which was associated with a different character.
There were multiple main characters that may or may not have special powers and I feel like they were connected through the pendants/stones.
Also not entirely sure if I remember it correctly, but I think one of the main characters had something to do with noticing/sensing or ending a pregnancy of another main character.
I read it in the early 2000s, bought it in a Dutch bookstore, if that's of any help.