So I tested positive for Group B Step meaning I will need an IV with antibiotics for childbirth. No biggie. However my OB tells me that the IV needs to be going for 4 hrs prior to delivery to be effective. As such I'm supposed to call when my contractions are 7 mins apart (as opposed to the usual 5 min rule). Also I'm already 2 cm dilated and 80% effaced. I'm worried I won't go in soon enough for the antibiotic!

Anyone have experience with GBS? How quickly did your labor progress?

Thx!