I was told that you are both correct to a degree.....that a good egg reserve tends to indicate a better quality of egg overall as there are more eggs being sent forth in each cycle still for that "good" egg to dominate and be fertilised. But that also in general egg quality does diminish with age...we know that as the downs risk goes up etc etc but as a general indicator the better the AMH number the better the quality. so for example a 42 yr old with an AMH of 3 has fewer eggs and more dodgy eggs than a 42 yr old with and AMH of 13.....they both still have more dodgy eggs than a 30 yr old though, if that makes sense......