The menstrual cycle plays an essential role in human reproduction. However, most other animals don't experience menstruation. So, which other species have periods, and what's the evolutionary point of ...

Elephants are among the smartest, largest animals on the planet. With all that size and brain power, it should come as no surprise that making a baby elephant is no easy task. In fact, elephants have ...

Carnivores living in the wild and zoos give birth at the same time of the year in a phenomenon called reproductive seasonality. Researchers at the Clinic for Zoo Animals, Exotic Pets, and Wildlife at ...

If you think pregnancy is long in humans, know that for some mammals, it can last almost two years! Here are some of the most ...

Pregnancy is often measured in weeks and months. For humans, nine months can feel long enough to change an entire life. But ...

Reproductive seasonality is a fixed characteristic of a species—University of Zurich re-searchers have now found that carnivores in captivity give birth at the same time of year as their counterparts ...

When it comes to animal parenting, different species have very different methods of raising their young as well as varying degrees of devotion. Some are in it for the long haul, while others are ...