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Aurora, IN
A 25-year-old female asked:

My doc had me get a transvaginal ultrasound for pelvic pain, the tech asked me when the 1st day of my last period was, why did she ask?

2 doctor answers5 doctors weighed in
Dr. David Wong
Emergency Medicine 22 years experience
Informational: You can actually see the lining of the uterus (womb) on ultrasound so knowing where you are in your cycle helps to know what they should expect to see.
Dr. David Rothfeld
Radiology 38 years experience
Multiple reasons: 1) to know if you could be pregnant 2) to know if you might still be bleeding 3) to be able to assess the thickness of your endometrium.
Last updated Jul 31, 2020

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