### Human:\ndoes menstruation affect a mammogram? . my daughter age 34 has found a lump in her breast. she is going for an ultrasound and her first mammogram on the second day of her period. would this affect the results of these tests?\n\n### Assistant: if her breasts become sore/tender with her menses having them squeezed to the size of pancake during a mammogram may not be pleasant. have her call the mammogram technician for advice. her period should not affect the accuracy of the test but it can affect her comfort.