问：怀孕七个月双顶径7.8厘米正常么

网友/编辑答疑:怀孕七个月双顶径7.8厘米正常么

孕周 双顶径BPD(mm) 头围HC（mm) 腹围AC(mm) 股骨长FL(mm)

28              70                262                  240                54

29              72                 271                  250               56

30              75                280                  260                58

31             77                289                 270                 61

32              79                297                  280                63

33               82               304                  290                 65

34               84                312                 300                 66

35               86                318                 309                 68

36               88                325                 318                70

37              90                331                 327                 72

38               91               336                 336                73

39               93                 341                 345                75

40               95                345                 354                 76