你这属于胎儿发育情况的问题。指导意见孕周股骨长度孕周股骨长度孕周股骨长度120.8223.9326.3131.1234.2336.5141.5244.4346.6151.8254.7356.8162.1264.9367.0172.4275.2377.2182.7285.4387.3193.0295.6397.5203.3305.8407.6213.6316.1可以对照一下。