Polynomial regression of gestational age on crown-rump length: quadratic or cubic

Am J Obstet Gynecol MFM. 2024 Mar;6(3):101243. doi: 10.1016/j.ajogmf.2023.101243. Epub 2023 Dec 16.

¹ School of Medicine, South China University of Technology, Guangzhou, China; Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China.
² Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Roa, Zhujiang New Town, Guangzhou 510623, China.
³ Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Roa, Zhujiang New Town, Guangzhou 510623, China. Electronic address: liuhs72@163.com.

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