[Biopsy of the chorionic villi in the early diagnosis of chromosomal diseases].

In the first trimester of pregnancy two simple chorionic villus sampling method, carried out under ultrasound guidance, with transabdominal or transcervical aspiration, was evaluated in 257 cases at risk for chromosomic diseases. The high efficacy of the transabdominal aspiration was demonstrated by obtain villus tissue for karyotyping in all but one case. In only one sample the abnormalities detected were not confirmed (one case of false positive).

[Predictive value of biometry in early pregnancy in comparison with birth weight].

The authors have compared the biometric measurement of the first trimester of gestation (CRL, gestation sac volume, GS vol./CRL ratio) with the respective weights at birth, in order to determine possible correlations. The result have showed no newborns SGA with biometric measurement greater than the 90 degrees percentile in the first trimester of pregnancy, and also no newborns LGA with biometric measurements smaller than the 10 degrees percentile.