Infertility may be caused by male factors, female factors, or a combination of the two. Unexplained infertility is the medical term for when doctors cannot find a clear explanation for infertility.

In recent years, the term “unexplained pay gap,” used to describe persistent disparities in compensation between men and women, has become commonplace in businesses around the world. The phenomenon, ...

Unexplained’s paranormal tales have astonished millions of listeners. As the show returns, its creator reveals the new mysteries to come Richard MacLean Smith is unspooling a remarkable story about ...

But a large number of incidents remain unexplained in the new report from the Office of the Director of National Intelligence, potentially fueling further speculation. By Julian E. Barnes WASHINGTON — ...

If you’ve ever noticed a sudden drop in weight after an illness, you’ve experienced unintentional weight loss fluctuation. But if you can’t point to something that may have caused the change on the ...