When should Group B Streptococcus swabbing be conducted in pregnancy?

Conducting Group B Streptococcus (GBS) swabbing during pregnancy is a crucial practice to prevent potential complications during delivery. The optimal time for this swabbing is between 35 to 37 weeks of gestation. This window is recommended because it allows for the identification of women who may carry GBS in their vaginal or rectal flora, thereby determining the need for antibiotic prophylaxis during labor to decrease the risk of early-onset GBS disease in the newborn.

Testing during this specific timeframe ensures that the results remain relevant and actionable. If swabbing were to occur too early, the status of GBS colonization could change as the pregnancy progresses. Therefore, conducting the swab within the 35 to 37-week period provides a snapshot of the woman’s GBS status closer to the time of delivery, allowing healthcare providers to develop an appropriate plan for managing potential risks associated with GBS.

This timing aligns well with clinical guidelines, emphasizing both the safety of the neonate and the mother's care during labor and delivery.