BACKGROUND: Cyclic neutropenia is characterized by regularly recurring episodes of neutropenia. It has been reported that pregnancy often has a mitigating effect on the symptoms. However, there have been no detailed studies an changes in the neutrophil count before, during and after pregnancy. CASE: A 24-year-old woman with cyclic neutropenia had a successful pregnancy, during which her symptoms improved spontaneously, with decreased severity. The disease recurred soon after pregnancy, and cyclic neutropenia was inherited by the child. CONCLUSION: Cyclic neutropenia may follow a favorable course during pregnancy, with decreased severity, but postpartum maternal and neonatal complications can occur.