Quest as.of Dec 9 4021 has new estradiol range of <39 and got rid of old range 13-54. I.am.wanting for.director of medical department.to.give.me a.call. They are offering the ultra.sensitive.test if they want. I.already let.them.know they will.lose a.lot.of.business due.to.this.change. It is.now designed.for.fertility reasons. I am going to see if.they will.keep.old.13-54.for hrt purposes.