My Wife and I Both Started Losing Hair At the Same Time

Both myself (49) and my wife (47) had very very thick hair. Our parents in the late 70’s still has most of their hair. And no baldness in both of our family. But we noticed in the last year both of our hair is getting very thin and showing sign of pattern balding.

The perplexing question is why is it happening to both of us at the same time?

I am not sure what you meant by pattern balding and the overall information you supplied is scant. To do a proper investigation of the coincidence, would would want to look carefully at what this hair loss pattern is, what are the possible environmental factors involved and give both of you a very thorough hair and scalp examination, as well as take a very careful, detailed medical history.