Apart from humans, do other animals have fertility problems?

Extinct ones. Also it is common for females under stress, or especially under body weight (assumed in non humans to be famine) to be unable to ovulate at that time. Also today many women wait until 30s to have children and the difference between that and sixteen is HUGE. read more

Yes other animals have fertility problems that is why a rancher has his bulls tested before breeding season. A cow may not cycle or be fertile. If a cow does not breed and the bull is not at fault then that cow should be sold to the packer. read more

Apart from humans, most of the other menstruating animals are primates, the group that includes monkeys and apes as well as humans. Most monkeys living in Africa and Asia, such as rhesus macaques, menstruate. Great apes do it too. Menstrual bleeding is easily detectable in chimpanzees and gibbons. read more