I keep most of my turtles, and tortoises outside, all year long. In the last few years, I have a few large indoor set ups. Mostly with water turtles. Over those years, I have lost a few gravid females. When I had my most recent necropsy, the vet suggested that using a MVB should help the problem. I know this debate has been going on for years. I was wondering what the most recent thought is about them.