Other studies show significantly decreased mobility and sperm quality as well (some in-vitro with microscope).

Anecdotally, I'm quite confident this was a factor with our 2nd child. With our 1st, I didn't own a cell phone and he was conceived literally the first try.

I bought a smart phone when he was 1, which I carried in my pocket. A few years later, we wanted another child - tried for 10 months with no results! Frustrating. I randomly found some studies covering this exact subject in mid July. I started putting my phone into my backpack. August, our 2nd was on his way.

For anyone who's having troubles, I would strongly advise to take the phone out of your pocket. It might even be best for everyone to do so - who knows the long term effects.