BACKGROUND: Since ultrasonography (USG) technology was discovered more than 40 years ago, fetal biometry with ultrasound measurements has become the prima donna, and it is considered an accurate method of estimating the baby’s birth weight AIM: this study is expected to provide more parameters and accurate results in determining fetal growth estimates. MATERIAL AND METHODS: This study is an analytical study using a cross-sectional approach to determine fetal growth biometry in the Minangkabau ethnic group. The selected sample was pregnant women who came to check their pregnancy in December 2020 at Fetomaternal clinic Hospital M. Djamil Padang and Network Hospital in the Department of Obstetrics and Gynecology Faculty of Medicine Andalas University. Bivariate analysis using Pearson correlation test because the data distribution was normally distributed with P value <0,05 and then multivariate analysis using linear regression. RESULTS: Four hundred pregnant women who came to check their pregnancy at 1st trimester (4-13 weeks by USG). The characteristics of the research subjects were the average age of pregnant women ranging from 21-31 years, primigravida, and the average level of education at senior high school. Based on the Pearson analysis, Correlation between of each variable GS and CRL to LMP, there is the strongest correlation between LMP (p-value 0,000). CONCLUSIONS: We have produced a national prescriptive standard for the initial measurement of fetal growth and the first-trimester ultrasound dating of pregnancy that can be used in Indonesia, especially in the Minangkabau ethnic group.