Intrauterine growth curves should be specific to each population and are needed for the Turkish population. An analysis of birthweight, crown-heel length, and head circumference in newborns between 25 and 42 weeks of gestational age was made. A total of 2481 babies were evaluated. Mean, standard deviation, and percentile values were calculated for each gestational age and smoothed curves were obtained for each parameter. In our country, the use of these new curves is more appropriate than those obtained in other countries.