[Comparison between transabdominal and transcervical chorionic villus sampling in clinical application for prenatal diagnosis].

Objective: To compare transabdominal and transcervical chorionic villus sampling (TC-CVS) in application for prenatal diagnosis, and to summarize the experience of transabdominal chorionic villus sampling (TA-CVS).

Methods: One hundred and nine TA-CVS between April 2005 and November 2007 and 69 TC-CVS between August 1999 and March 2005 were retrospectively analyzed.

Results: (1) The mean gestational age was (12.4 +/- 1.9) weeks at TA-CVS and (8.8 +/- 1.2) weeks at TC-CVS (P < 0.01). (2) Compared with TC-CVS, punctures were fewer (1.4 +/- 0.5) and (1.1 +/- 0.4) and specimen amount was more (9 +/- 5) mg and (17 +/- 5) mg in TA-CVS, and the success rate of one puncture (62.3% vs 87.2%) was higher in TA-CVS. (3) Among the cases followed up, the incidence of vaginal bleeding (TA-CVS: 2 cases, 2.0%; TC-CVS: 2 cases, 6.1%) and spontaneous abortion (TA-CVS: 4 cases, 4.0%; TC-CVS: 1 cases, 3.0%) were not significantly different between the two groups (P > 0.05).

Conclusion: TA-CVS appears to be a good method for early prenatal diagnosis with a wide range of indications, high success rate and sufficient specimen.