The development region of axisymmetric laminar jets with uniform and parabolic exit velocity profiles are considered analytically using separate, mathematical modelling assumptions:​ Both solutions employ integral techniques and are shown to be relatively simple, and also in reasonable agreement with existing experimental and theoretical results. The results of an experimental investigation of the parabolic exit velocity case is also reported. A Laser Doppler Anemometer was used to measure velocity profiles without disturbing the flow. Flow visualization was also. employed to ensure that measurements were taken only in the laminar region. As well as providing additional verification of the present analytical method, certain observations were made concerning the axial variation of momentum, location of the virtual origin and development length. The proper nondimensional coordinate was also verified to be x/d Re_c as obtained from a dimensional analysis of the pertinent equations of motion.