Uterus biopsy the doctor couldn't perform a uterus biopsy because it was tight. i have three natural kids. is not suppose to be like that. what might cause to be that tight?

When : When your provider wants to perform a biospy, it is typically because he/she wants to study a sample of abnormal tissue found on the organ. It is possible that the location of the abnormal tissue on your uterus was in a 'tight spot', (too close to other organs or vasculature) making the sample unobtainable.

Please Clarify: Was the biopsy impossible because your cervix was too tight or your vaginal canal was too tight. The latter can happen if you had a tear during delivery or an episiotomy that had to be sewed up. It might have been repaired to tightly.