An amniocentesis was done, revealing normal karyotype (46,XX).Screening tests for fetal infections (toxoplasmosis, MNI, rubeola, CMV, herpes, Coxsackie, enterovirus and Chikungunya) were negative.

• 羊水穿刺显示核型正常（46，xx），胚胎感染筛查试验阴性。