Thanks you for your input as well Raul.

It seems to get quite confusing right now. Haha!
Some people on a Dutch forum told me they were ovulating for sure, some people here told me they are ovulating as well (at least the bottom two), and now you tell me you think they are still building.
But how about the sheds then?
The first girl did shed 19 days after what seems to be her ovulation.
The second girl is in shed right now, so I quess she'll shed around the 17th of february (20 days after what seems to be here ovulation).
And the third girl 'ovulated' at the 4th of february and she is getting pretty dark now, so she seems to go in shed as well.

At multiple sites it is said that girls will shed between 2-3 weeks after there ovulations, so if you go from there it seems to be that all three girls should have been ovulated.
If it is still building, like some people said, why did they shed then?
It's so confusing right now! Hahaha!