What Does This Ultrasound Scan During 20 Weeks Of Pregnancy Indicate?

Hello there,I m 20 weeks and 4 days pregnent, just had my scan done. I ve been told that my baby have short long bones.HC-174.3mm TCD-19.2mm,AC-151.1mm,FL-29.4mm,Humerus Length-27.0mm,Radius Length-23.0mm,Ulna Length-26.0mm,Tabia Length-25.0mm,Fibula Length-25.0mm,Est weight 312 g.Please tell me if there is anything to worry about :(