Not sure how many on here are Downton Abbey watchers, and technically this isn't really a spoiler for this season, just an observation...
I was catching up on Sunday night's episode and one of the characters takes a (very pompous) doctor aside and expresses some concerns to him about the fact that he and his wife haven't yet conceived, and he is concerned it might be him. He tells the doctor they are " very anxious" to have a child and it's been a few months with no success.
The doctor cuts him off and tells him the use of the word "anxious" tells him that that is the problem, and that stress is the worst enemy when you are trying to conceive, etc. and it wasn't necessary to run any tests on him.
So basically, he told him to "relax and it will happen".
Of course back then really, what other options did anyone have but to hope that was the answer. Then when it didn't work, just blame the barren female.