英语语法分析

"The obstetric outcome was a disaster," he admits, "but the embryos were chromosomally normal."

“产科产生这样的后果真是一场灾难，”他承认说，“但是从染色体来看，这些胚胎都是正常的。”

Currently, this is the only way to determine whether the embryo is chromosomally normal or "balanced", prior to pregnancy.

目前，这是在怀孕前确定染色体是否正常或“平衡”的唯一方法。

Preimplantation genetic testing for chromosomal translocations is able to distinguish between chromosomally normal and abnormal embryos.

染色体易位植入前基因检测能够区分正常和异常染色体的胚胎。