I read this article and found it very interesting. I hope they look into it more to confirm how accurate they are about the study. I find it unfortunate if this was one of the big factors that have decreased polar bear births in US zoos. Although I am not even sure what polar bears were on birth control as I thought most were paired up in recent years. The only one I know that is definite is the female at the Alaska Zoo.
Healthy young breeding populations are essential for zoos to sustain their populations and possibly have animals for release in the future in some cases.
Cophagen has been vindicated by this, as it shows their concerns are valid.
Contraception, Copenhagen Zoo officials noted, has health repercussions.
More zoos need to take this approach and educate the public that animals are born breed and die in nature and this needs to be replicated in captive populations. Zoos killing excess animals needs to be seen as nature where deaths are expected. The only difference is that humans kill animals humanely unlike how they are killed in the wild.