VIENNA (Reuters Health) - US scientists said on Monday they have developed a biological "magnet" for healthy sperm that will allow them to weed out those that are genetically faulty before carrying out assisted reproduction. Professor Gabor Huszar from Yale University in New Haven, Connecticut, said that intracytoplasmic sperm injection (ICSI)--which is used to overcome male infertility by injecting a single sperm directly into the egg--bypasses the evolutionary sperm selection process. "We do not know for sure what the risks are of allowing these genetically damaged sperm that would normally never fertilise the egg to cause a pregnancy," he told...