From what I always understood a gyps heat cycle is 3 parts over 3 weeks, first week swelling begins and a lil bleeding, 2nd week bleeding clears up, clear fluid is present, still swollen. This is the week I understand is the only time period the gyp can be bred or the best chances the pregnancy will take. 3rd week the gyp starts to come out of heat, less fluid present and swelling is going down. .
I dont know how accurate this actually is, but it sounds good anyways!!