Treit P, Zoltán K
Zentralbl Gynakol. 1983;105(15):989-92.
The direct control by ultrasound allows a biopsy from chorion frondosum without danger and reveals new possibilities to diagnose malformations in the first trimester of pregnancy in time.
超声直接控制可在无危险的情况下从绒毛膜取样,并为及时诊断孕早期畸形带来了新的可能性。