孕28周，双顶径70腹围261:股骨长50

病情分析：
13周:双顶径2.52士0.25'腹围6.90士l.65'股骨长1.17士0.31.14周:双顶径2.83士0.57'腹围7.77士1.82'股骨长1.38士0.48.15周:双顶径3.23士0.51'腹围9.13士1.56'股骨长1.74士0.58.16周:双顶径3.62士0.58'腹围10.32士1.92'股骨长2.10士0.51.17周:双顶径3.97士0.44'腹围11.49士1.62'股骨长2.52士0.44.18周:双顶径4.25士0.53'腹围12.41士l.89'股骨长2.71士0.46.19周:双顶径4.52士0.53'腹围13.59士2.30'股骨长3.03士0.50.20周:双顶径4.88士0.58'腹围14.80士l.89'股骨长3.35士O.47.21周:双顶径5.22士0.42'腹围15.62士1.84'股骨长3.64士0.40.22周:双顶径5.45士0.57'腹围16.70士2.23'股骨长3.82士0.47.23周:双顶径5.80士0.44'腹围17.90士1.85'股骨长4.21士0.41.24周:双顶径6.05士0.50'腹围18.74士2.23'股骨长4.36士0.51.25周:双顶径6.39士0.70'腹围19.64士2.20'股骨长4.65士0.42.26周:双顶径6.68士0.61'腹围21.62士2.30'股骨长4.87士O.41.27周:双顶径6.98士0.57'腹围21.81士2.12'股骨长5.10士0.41.28周:双顶径7.24士O.65'腹围22.86士2.41'股骨长5.35士0.55.29周:双顶径7.50士0.65'腹围:23.71士1.50'股骨长5.61士0.44.30周:双顶径7.83士0.62'腹围:24.88士2.03'股骨长5.77士0.47.31周:双顶径8.06士0.60'腹围:25.78士2.32'股骨长6.03士0.38.32周:双顶径8.17士0.65'腹围:26.20士2.33'股骨长6.43士0.49.33周:双顶径8.50士0.47'腹围:27.78:士2.30'股骨长6.52士0.46.34周:双顶径8.61士0.63'腹围:27.99士2.55'股骨长6.62士0.43.35周:双顶径8.70士0.55'腹围:28.74士2.88'股骨长6.71士0.45.36周:双顶径8.81士0.57'腹围:29.44士2.83'股骨长6.95士0.47.37周:双顶径9.00士0.63'腹围:30.14士2017'股骨长7.10士0.52.38周:双顶径9.08士0.59'腹围:30.63士2.83'股骨长7.20士0.43.39周:双顶径9.21士0.59'腹围:31.34士3.12'股骨长7.34士0.53.40周:双顶径9.28士0.50'腹围:31.49士2.79'股骨长7.4士0.53.双顶径：ＢＰＤ代表胎头双顶径，是指胎儿头两边直径测量的数据，也是推算胎儿大小的指标之一。按一般规律，怀孕3个月时小于3厘米；在怀孕5个月以后，基本与怀孕月份相符，也就是说，妊娠28周（7个月）时ＢＰＤ约为7厘米，32周（8个月）时约为8厘米，以此类推。怀孕8个月以后，平均每周增长约为0.2厘米为正常。