Honeybee, there's a women at the ABA that's done a lot of research into breastfeeding and IVF - she might have a line on this. Worth giving them a call anyway. I wouldn't be surprised if there's little known about the affects of breastfeeding in these circumstances.

Also, while bf in itself may not affect those numbers, the fact that you're currently not have cycles might (i guess). It is possible to have a normal cycle while breastfeeding and even do IVF without weaning - it just depends on the circumstances. How much are you feeding now? Cutting back might be enough to bring af back - it's a compromise, but would give you a better indication of what's going on without fully weaning (hopefully).

The decision to wean your first to try for another is really hard - especially when there's so much uncertainty about conceiving at all. It's why we put off ttc #2 till DS was 2.

Hope the next week isn't too stressful and you can get some clarity from your FS