I am a chronic migraine sufferer, so they try not to overdose me so that i don't end up in hospital. Also, i had a really really high follicle response to Clomid (17 follies on my first and a few less on the other times), so they know i'm a bit sensitive.
Also, I hate to say it but it's an age thing i think
I am meant to have good eggs at my age, so they don't need to get so many as my chances meant to be better. However my last full stim cycle was a total bust because i had cr@ppy egg quality. All medical professionals were surprised. So age is no reliable measure.