I've never heard of anyone losing babies because of carnivore. I've heard many dozens of testimonies to the opposite ..mainly because a body needs healthy fats, especially cholesterol, for hormone production. I'd like to ask the woman you met how long she was doing carnivore, if she lost babies prior to carnivore, other pre-existing health problems before carnivore, etc. So many people are unhealthy and sick because of a horrible diet over a span of decades and so it's not going to heal overnight. For many, some symptoms go away in weeks, and other symptoms/issues take months or gradually over years. Her pregnancy losses were most likely due to pre-existing health issues.
For me, I dealt with several trauma-injury related conditions like costochondritis, Tietze Syndrome, Thoracic Outlet Syndrome to name a few. There were times when I couldn't lift my head off the pillow or use my arms because of dislocations (shoulders, base of skull issues) ...dislocated ribs and hips, twisted spine, etc, and often had to use crutches. But as of almost 3 years ago (after being on carnivore) my pain levels are down about 85-90% ...my balance is restored, have more muscle tone, better muscle strength ...and I'm not using crutches. I praise God every time I have to reach an upper cabinet and my shoulders work, and my ribs aren't feeling like they're crushed.