羊膜腔穿刺的时间，标准的操作是在≤孕期第１５周，然而医师和病人都希望较早采样作出诊断。对中孕早期作胎儿诊断操作的危险性尚未完全明确。作者设计前瞻性研究，以了解中孕早期羊膜腔穿刺的成功率是否与标准操作时间相同。将１９９２年１月至１９９４年１２月行羊膜腔... Amniocentesis time, standard operation is ≤ 15 weeks of pregnancy, however, both physicians and patients want earlier sampling for diagnosis. The risk of fetal diagnosis in the early stages of pregnancy is not yet fully understood. We designed a prospective study to determine if the success rate of early triamcinolotidine was the same as the standard operating time. Will 1992 January to 1994 December line amniotic cavity ...