I haven't experienced it from neither Clomid nor Femara. I have not taken Gonal F, though. You aren't on any thyroid meds by chance are you? I know they can cause hair loss.
I have read somewhere that PCOs`s may cause hairfall,,,Please take precautions while we dont know when we get BFP! Just use some herbal oils,,it may even due to the stress u undergo while on medication, no actually treatment,,,,
Good luck,,,,,,,