Overdue Holstein Calf.
This overdue Holstein heifer calf was homozygous recessive for the Prolonged Gestation gene, which manifests itself by failure of the initiation of parturition as a result of nonfunctioning adrenal glands. Its postmaturity is evident by the long hair, excessive birthweight, large umbilical stump, and meconium staining. The calf was delivered by cesarean section 38 days past term.
Drost M (1967)