Objective: To evaluate the collection of trophoblastic cells and it s affecting factors in endocervical canal during early pregnancy.

 
  • 目的:探討孕早期子宮頸管脫落滋養細胞的收集與影響因素,為進(jìn)一步的孕早期無(wú)創(chuàng )性產(chǎn)前診斷奠定基礎。
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