One of my staff members had this done a few weeks ago due to similar medical problems we who are ttc are currently experiencing right now but she's not trying to get pregnant right now just deal with her health. Below is an explanation of the purpose and why it's done. Hope this helps you understand somewhat:

What Is an Endometrial Biopsy?

An endometrial biopsy is the removal of a small piece of tissue from the endometrium (the lining of the uterus). This tissue sample can show cell changes due to abnormal tissues or variations in hormone levels.

Taking a small sample of endometrial tissue helps your doctor diagnose certain medical conditions. A biopsy can also check for uterine infections such as endometritis.

An endometrial biopsy may be performed to help diagnose abnormalities of the uterus. It can also rule out other diseases.

Your doctor may want to perform an endometrial biopsy to:

find the cause of postmenopausal bleeding or abnormal uterine bleeding
screen for endometrial cancer
evaluate fertility
test your response to hormone therapy

You can’t get an endometrial biopsy during pregnancy and shouldn’t if you have any of the following conditions:

a blood-clotting disorder
acute pelvic inflammatory disease
acute cervical or vaginal infection
cervical cancer
cervical stenosis (severe narrowing of the cervix)

endometrial biopsy

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