(CNN)I recently saw a 50-year-old man and his 35-year-old wife in clinic who have been trying to get pregnant for the past 18 months. The couple told me that conceiving their daughter, who is now 7 years old, was a piece of cake, and within a couple of weeks of trying they were pregnant. But that was then. Now, their efforts at a second child had been fruitless for well … Continue reading The male biological clock: Reality bites by CNN