Maxim doesn't mind discussing his sperm. In fact, he wishes more in Ukraine's military would talk about their fertility – or at least think about it. "Our men are dying. The Ukrainian gene pool is dying. This is about the survival of our nation," the soldier tells me, speaking by phone from a position somewhere near the eastern frontline. The 35-year-old is serving with Ukraine's National Guard and when he returned on leave recently his wife persuaded him to visit a clinic in Kyiv and leave a