Transcervical probably leads to higher sampling failure compared with transabdominal chorionic villus sampling (moderate certainty).
It is very uncertain whether transcervical changes all known pregnancy loss (including termination of pregnancy) compared with transabdominal chorionic villus sampling (very low certainty).
It is very uncertain whether transcervical changes spontaneous miscarriage compared with transabdominal chorionic villus sampling (very low certainty).
Transcervical showed no clear difference in laboratory failure compared with transabdominal chorionic villus sampling (low certainty).
The review found no eligible studies for this question.
The review found no eligible studies for this question.
Transcervical showed no clear difference in anomalies (all recorded) compared with transabdominal chorionic villus sampling (low certainty).
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