I am wondering about healthy blood counts while undergoing chemo and how low it can go. I am 50% done with a 4 treatment regimine for breast cancer. I am 48, about 130lbs, my license says 5' but thats pushing it. I am a week out of second chemo, today my hemoglobin was 11.2, wbc 4.5 and platelet 291. My oncologist said its all good, but I am curious about to see if it is on low side and how low it can go with my treatments.