患者女性,27岁。主因第3胎宫内孕40周,规律性腹痛3小时入院。患者孕3产2,均因羊水过多早产两死婴,均为男孩,当时查新生儿无明显畸形。本次末次月经:1989年9月20日,预产期1990年6月27日,停经后有轻度恶心反应,孕2+月时有感冒发热史,曾服用安乃近,速效感冒胶囊等药。父母体健,家族中无白化症病史。家中兄弟五 Patient female, 27 years old. The main reason for the third intrauterine pregnancy 40 weeks, regular abdominal pain 3 hours admission. 3 patients with pregnancy 2, both because of premature polyhydramnios premature birth two dead infants, are boys, then check the newborn no significant deformity. The last menstrual period: September 20, 1989, the expected date of June 27, 1990, after menopause mild nausea reaction, pregnant with fever in the history of the past 2 months, had taken metamizuma, quick cold capsules and other drugs. Parents healthy, no history of albinism in the family. Five brothers at home