Biallelic mutations in <i>UGDH</i> cause congenital microcephaly.

"Conflict of interests All authors declare that there is no conflict of interests."

"Funding This work was supported by the Natural Science Foundation of Hunan Province, China (No. 2021JJ40280), the 10.13039/501100012166National Key Research and Development Program of China (No. 2021YFC1005300), the Major Scientific and Technological Projects for Collaborative Prevention and Control of Birth Defects in Hunan Province, China (No. 2019SK1010, 2019SK1014), the National Key R&D Program of China (No. 2019YFC1005100), the 10.13039/501100002767Hunan Provincial Science and Technology Department (China) (No. 2018SK2064), the Joint Construction Project of Henan Medical Science and Technology Project (China) (No. LHGJ20200618, 2018020633), and the Henan Engineering Research Center of Childhood Neurodevelopment Open Project (China) (No. SG201907)."