文档介绍：孕周双顶径BPD(mm)头围HC(mm)腹围AC(mm)股骨长FL(mm)12          20          71            56            813          23          84            69            1114          27          98            81            1515          30          111            93            1816          33          124            105            2117          37          137            117            2418          40          150            129            2719          43          163            141            3020          46          175            152            3321          50          187            164            3622          53          199            175            3923          56          210            186            4224          58          221            197            4425          61          232            208            4726          64          242            219            4927          67          252            229            5228          70          262            240            5429          72          271            250            5630          75          280            260            5831          77          289            270            6132          79          297            280            6333          82          304            290            6534          84          312            300            6635          86          318            309            6836          88          325