Julie Wiebe is an incredible Women's Health Physio based in the US.  I've done most of her online courses (twice!) and I would say that she is the professional that has most influenced my thinking as a pre- and postnatal exercise specialist.

I highly recommend her courses, there is stuff for women that want to get fit and understand the way their core and pelvic floor work, as well as more in-depth courses for fitness pros.

Affiliate disclosure: If you purchase this course through this link, I will be compensated.