1. In a preliminary human trial, infertile couples given vitamin E showed a significant increase in fertility. �ڳ����������飬���з���ά����E����������������������
2. B. Infertility may be the presenting complaint for endometriosis. Infertile patients often have no painful symptoms. ���п���������֢���ֲ�ʷ�������еĻ��߾���û����ʹ��֢״��
3. Method: Sperm DNA integrity of 40 semen samples from nonoligospermatism infertile men were detected by the using of comet assay before freezing and after thawing. ������������������40�����پ���֢�������߾�Һ�䶳ǰ�����պ��Ӻ�DNA���������ԡ�