In our estimation of the fetal age, we depend on the measurement of the embryo’s length, the biparietal diameter length and the femur length, rather than on measurement of the diameter and circumference of the abdomen. This study has been conducted and completed by one person only - the researcher, specifically- and has been compared with world studies. Accordingly, it has been found that its conclusions have been close to the Hadlock Table between the 14th week and the 32nd week of pregnancy, and close to the Russian Table between the 27th week and the end of pregnancy, whereas the Japanese Table seemed to have lower figures. If we take the average of the Hadlock and the Japanese Tables, we find out that it is equal to the Syrian Table “No. 4”, and the average fetus weight in our country seems to be close to the average fetal weight in the U. S. A. The results of this study are the more appropriate for the medical practice in the Syrian Arab Republic, as the fetus measurements and weight differ from one country to another due to differences in several factors among which are: the social, racial, climatic and economical factors among the countries of the world.