Table 2.

Summary of studies examining NMDAR expression in littermate and non-littermate Fmr1 KO mice. (Studies examining NMDAR expression in Fmr1 KO mice were subdivided into two groups: (i) littermate and (ii) non-littermate mice.)

	NMDAR phenotype	studies	ref.
littermate	increase	—	—
	no change	Bostrom et al. 2015	[32]
		Chatterjee et al. 2018	[68]
		Yau et al. 2018	[69]
	decrease	Bostrom et al. 2015	[32]
non-littermate	increase	Schutt et al. 2009	[66]
		Toft et al. 2016	[67]
		Lundbye et al. 2018	[38]
	no change	—	—
	decrease	Li et al. 2023	[50]