u/Lower_Ice9306

Are these tests necessary before doing a retrieval?? If someone can explain them a little bit to me as I read somewhere here that AMH is not really necessary if the doctor didn't push for it and if FSH and AFC are good? What's the difference between them? Is there any way to improve AMH and does it have any impact on irregular periods (spotting or lighter period), though only my last period came early and am still seeing brown blood past my seven days (only nine days today). Any info and advice is much appreciated!