Determination of Fetal gestational age in singleton pregnancies: Accuracy of ultrasonographic placenta thickness and volume at a Nigerian tertiary Hospital. AJBR [Internet]. 2022(e)ko maiatzaren 30(e)an [aipatua 2026(e)ko apirilaren 5(e)an];25(2):113-9. Available at: https://www.ojshostng.com/index.php/ajbr/article/view/1758