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Male fertility declines with age, and risks to offspring increase. Here's what you need to know about men's biological clock

United statesJamesa kashanianBrent hansonMick jaggerAl pacinoPaul turekRobert de niroKian asanadPresbyterian weill cornell medical centerWomen sexual healthKeck school of medicineColumbia universityDepartment of urology at weill cornell medicineWeill cornell medical centerSexual healthWeill cornell medicine