Is There Any Need Of Biopsy For Uterine Thickening?

HI, I am 53 almost 54 yrs old and have had internal sonograms, pictures, external sonogram, pap smears and all results have been good. I have been diagnosed with uterine thickening which if 6 mm now and am scheduled for a biopsy next week. Sorry, thought this was a FREEE site and am not interested in having to pay for an answer, I do not like giving out Credit card info on-line.