Demographic correlates of gestational age at booking among antenatal clinic attendees in secondary healthcare facilities in semi-urban/rural areas of Rivers state, Southern Nigeria. The Nig Health J [Internet]. 2022 Oct. 21 [cited 2025 May 9];22(3):305-10. Available from: https://www.tnhjph.com/index.php/tnhj/article/view/607