Assessment of Four Different Methods of Measuring Biparietal Diameter through Comparative Analysis: A Prospective Study

The study evaluates the accuracy of the different methods of measuring biparietal diameter (BPD) as an index of estimating gestational age (GA). This study was a prospective comparative analysis with 107 pregnant patient’s participants. They were examined abdominally in university of Calabar teaching hospital, cross River, Nigeria. The paired t-test was employed to compare the different methods of biparietal diameter to assess their accuracy. The results showed that there was no significant difference (P˂0.05) in the methods of estimating gestational age using biparietal method except for outer to inner and table and table method which was 0.0719. When the paired t-test sample was used to compare the different methods with the last menstrual period (LMP) and gestational age, there was no significant difference in all the four different methods. However, the outer to inner and table to table method appears to be more significant indicating its suitability as a method of obtaining gestational age using biparietal diameter.