Before revision: The clinical specimens recommended for culture of GBS at 36–37 weeks ’ gestation, this recommendation provides a 5-week window for valid culture results that includes births that occur up to a gestational age of at least 41 weeks (32–34 weeks of gestation for women with twins) are swabs collected the lower vagina (near the introitus) and then from the rectum (through the anal sphincter) without use of a speculum.
After revision: The clinical specimens recommended for culture of GBS at 36–37 weeks ' gestation, this recommendation provides a 5-week window for valid culture results that includes births that occur up to a gestational age of at least 41 weeks (32–34 weeks of gestation for women with twins) are swabs collected the lower vagina (near the introitus) and then from the rectum (through the anal sphincter) without use of a speculum.