A typical intrapartum antibiotic regimen consists of both of the following: Ampicillin 2 g IV every 6 hours Gentamicin 2 mg / kg IV (loading dose) followed by 1.5 mg / kg IV every 8 hours or gentamicin 5 mg / kg IV every 24 hours In addition, if delivery is cesarean, one additional dose of the chosen regimen plus a dose of clindamycin 900 mg IV or metronidazole 500 mg IV can be given after the umbilical cord is clamped.