Weird question. Unless you were in occupied Europe during World War II, there haven’t been “tough times” in modern times. Even in 1648 or the Crusades, the “tough times” only lasted a few weeks. Today the world is universally more peaceful, prosperous and healthy than anytime in human history – especially for Yidden, but also for goyim.
If you run into frum Jews born between 1940 and 1945, you have your answer. Even in Mitsrayim people still had children – there’s an agada saying that we were saved in the zechus of the wives who didn’t let tought times bother them.