yī / shēng / jiàn / yì / yùn / fù / zài / yùn / zhōng / qī / zuò / yáng / shuǐ / chuān / cì / jiǎn / chá医生建议孕妇在孕中期做羊水穿刺检查。The doctor advises pregnant women to have an amniocentesis in the second trimester.