Moderate folic acid supplementation and MTHFD1-synthetase deficiency in mice, a model for the R653Q variant, result in embryonic defects and abnormal placental development.
Christensen KE, Hou W, Bahous RH, Deng L, Malysheva OV, Arning E, Bottiglieri T, Caudill MA, Jerome-Majewska LA, Rozen R. Am J Clin Nutr. 2016 Nov; 104(5):1459-1469. Epub 2016 Oct 5.