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A term male infant born to nonconsanguineous parents was admitted to the hospital for evaluation of lethargy and a pale appearance on the third day of life. He had anemia from an intracranial hemorrhage, and his coagulation factor assay revealed that his bleeding episode was due to severe congenital factor VII deficiency (5% of normal activity). An A-to-G point mutation in the acceptor splice site of intron 5 was identified at nucleotide position 9418. Sequence analysis of the factor VII gene in the parents revealed that they were both heterozygous for a G-to-A transversion at nucleotide position 9418 (IVS5-1) between intron 5 and exon 6. A genetic study involving a patient with a congenitally inherited disease and the parents can confirm the genetic background of the disease and can be used for prenatal guidance to exclude severe bleeding disorders.