Intravenous immunoglobulin (IVIG) efficiency in women with common variable immunodeficiency (CVID) decreases significantly during pregnancy.

Immunoglobulin replacement therapy, including intravenous immunoglobulin (IVIG), is essential for pregnant women with common variable immunodeficiency (CVID) since it prevents infection and improves the health of the newborn. There are no established IVIG treatment protocols for pregnant women with CVID, and the relationship between IVIG treatment and maternal serum IgG changes during pregnancy remains unclear. Therefore, we reviewed the medical charts of four CVID patients, including one receiving subcutaneous immunoglobulin (SCIG), for IVIG dose and frequency, maternal serum IgG changes, obstetrical findings, and perinatal outcomes. There were no serious infections but one abortion and all patients continued therapy without IVIG-related adverse events. All eight children born to the patients were healthy at one month. However, the IVIG efficiency in those with CVID significantly decreased with progression of the gestational period, suggesting that IVIG dose and frequency may be changed during pregnancy to maintain stable serum IgG trough levels in women with CVID.