BackgroundInadequacy of antenatal care (ANC) utilization is a prominent public health problem, causing poor pregnancy outcomes. In developing countries, including Ethiopia, having ANC coverage, many pregnant women do not achieve the first ANC visits in the first trimester and receive at least four ANC visits. Therefore, this study aimed to examine the magnitude and identify determinants of inadequacy of antenatal care attendance amongst pregnant women in Ethiopia.MethodsInadequate ANC attendance was defined as combining starting ANC visits after the first trimester and having fewer than four visits together. The study used secondary data from the 2019 mini-demographic and health survey. A weighted sample of 3927 pregnant women was included in this study. Data management and further analysis were performed using STATA 14 software. A multivariable generalized estimating equation analysis was used to identify determinants associated with inadequacy of antenatal care attendance. The Adjusted odds ratio with a 95% confidence interval was used to identify significant variables for inadequate antenatal care visits.ResultOverall, 78.5% of pregnant women did not attend adequate antenatal care visits during pregnancy. In multivariable generalized estimating equation analysis, women aged 25 to 34 years (AOR = 0.77, 95% CI: 0.61–0.95), being educated (AOR = 0.31; 95% CI: 0.22–0.45), and being wealthier index (AOR = 0.67, 95% CI: 0.51–0.88) were less likely to inadequate antenatal care attendance. Whereas being rural residents (AOR = 1.49; 95% CI:1.08–2.07), no television exposure (AOR = 1.51; 95% CI:1.1–2.06), having more family members in the household (AOR = 1.81; 95% CI: 1.11–2.95), and women from semi-peripheral region (AOR = 1.92; 95% CI: 1.42–2.59) were higher odds of being associated with inadequacy of antenatal care attendance.ConclusionsThe prevalence of Inadequate antenatal care attendance amongst pregnant women in Ethiopia is still High. The study identifies significant variables that could be positively and negatively associated with inadequate antenatal care visits. Health education interventions should target uneducated, poorer, and rural women to attend early antenatal care and use at least four antenatal care utilization for early detection of complications during pregnancy and delivery.