Relative to 21 untreated comparison fetuses, subsequent prenatal growth of the aortic and mitral valves, but not the left ventricle, was improved after intervention.

• 和21例未治疗的胎儿相比，治疗后的主动脉瓣和二尖瓣在出生前的生长得到改善，而左心室无此表现。