The World Health Organization in a bid to improve mother and child experience during pregnancy and delivery had recommended for optimal birth experience, at least four antenatal visits (ANC4+) in 2002 and recently an upward review to eight minimum antenatal visits (ANC8+) in 2016 to a health facility by pregnant women. This study therefore is to investigate the implications of these optimal recommendations with respect to spatial effects and determinants in Nigeria using data extracted from the 2018 Nigerian Demographic Health Survey. Bayesian models with appropriate priors were fitted for each of these distributions using structured additive regression modeling technique. The Integrated Nested Laplace Approximation method was used to estimate the parameters of the models. A north–south dichotomy in the spatial distribution of ANC utilization in Nigeria was prominent only at the ANC8+ utilization level. Furthermore, some interesting revelations showed that Igbo and Yoruba women in southern Nigeria shared association with attaining four antenatal visits during pregnancy, while only Igbo women had high potential for eight antenatal visits. Only Adamawa state was significantly highly associated with the two optimal ANC levels (ANC4+ and ANC8+) in the Northern region. The nonlinear effects of respondents’ current age at birth at the time of survey showed the older women have higher potential to attain higher utilization levels than the younger ones.

为了改善怀孕和分娩期间的母亲和儿童体验，世界卫生组织建议最佳分娩体验，2002 年至少进行 4 次产前检查 (ANC4+)，最近又向上审查到 2016 年至少进行 8 次产前检查 (ANC8+)，以确保最佳分娩体验。孕妇保健机构。因此，本研究旨在利用 2018 年尼日利亚人口健康调查中提取的数据来调查这些最佳建议对尼日利亚空间效应和决定因素的影响。使用结构化加性回归建模技术，为每个分布拟合具有适当先验的贝叶斯模型。使用集成嵌套拉普拉斯逼近法来估计模型的参数。尼日利亚 ANC 利用空间分布的南北二分性仅在 ANC8+ 利用水平上较为突出。此外，一些有趣的发现表明，尼日利亚南部的伊博族和约鲁巴族妇女在怀孕期间都进行了四次产前检查，而只有伊博族妇女有很高的潜力进行八次产前检查。只有阿达马瓦州与北部地区的两个最佳 ANC 水平（ANC4+ 和 ANC8+）显着高度相关。调查时受访者当前出生年龄的非线性效应表明，老年女性比年轻女性更有潜力获得更高的利用水平。