不孕症是指婚后同居，有正常性生活，未避孕达1年以上而未能怀孕者。根据婚后是否受过孕又可分为原发性不孕和继发性不孕。原发性不孕指从未妊娠过;继发性不孕指曾有过妊娠，以后1年以上未避孕而未再妊娠。根据不孕的原因可分为相对不孕和绝对不孕：相对不孕是指夫妇一方因某种原因阻...
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