We have 4 healthy children that I breastfed for their first 2 1/2-3 years. Then we attempted to have another child. I lost the next three. With the exception of one, they were late miscarriages. My sister has graciously offered to be a surrogate for us so that we might have another child. Since my last miscarriage was on May 12, 2006 I decided to see if I still had any milk. I first attempted to pump on May 24th when she came to me with the offer. I only had a few drops of colostrum. I've been pumping every few hours and now am up to about 1 1/2-2 ounces per day. Does anyone know-will this cause me not to ovulate? I will be going through the invitro process shortly -hopefully and don't want to cause a problem. I had hoped to keep pumping to be able to offer some breastmilk to any baby my sister may be able to have for us. I know this may sound very odd. Just wondering if anyone could give me some advice.