These patients presented no variants in genes previously associated with MGS or any other form of primordial dwarfism; however, all patients present variants of the essential DNA replication gene GINS3, P1 being compound heterozygous (c.71A>G, p.[Asp24Gly], and c.245G>A, p.[Arg82Gln]) and P2 through P7 being homozygous (P2–P4 for c.70G>A, p.[Asp24Asn]; P5–P7 for c.71A>G, p.[Asp24Gly]). The gene discussed is GINS3; the disease is isolated growth hormone deficiency type IA.