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Abnormal Bleeding Specialist

Yuan-Da Fan, MD -  - Gynecologist

Yuan-Da Fan, MD

Gynecologist located in Union Square, San Francisco, CA

Experiencing spotting between periods, consistently heavy periods, or periods that last for longer than a week might seem like nothing more than an inconvenience, but these symptoms could indicate a deeper underlying issue. Gynecologist Yuan-Da Fan, MD, specializes in evaluating and treating abnormal bleeding at his office in the Union Square neighborhood of San Francisco, California. Contact the office by phone or schedule an appointment online today.

Abnormal Bleeding Q & A

What is abnormal bleeding?

Abnormal bleeding, or abnormal uterine bleeding, is a symptom common in women’s health because it includes a few different types. Abnormal bleeding includes any bleeding outside of your monthly menstrual period that comes out of your uterus by way of your vaginal canal. You have abnormal bleeding if you experience:

  • Bleeding or spotting after sex
  • Bleeding or spotting after menopause
  • Any bleeding or spotting between periods
  • Prolonged menstrual periods
  • Heavy menstrual periods
  • Inconsistent menstrual periods


Diagnosing abnormal uterine bleeding usually requires some extra testing after a standard pelvic examination. For example, Dr. Fan might offer you a pregnancy test, a Pap smear, pelvic ultrasound, or complete blood count during your visit for abnormal bleeding concerns. 

What causes abnormal bleeding?

There are several gynecological conditions that cause abnormal bleeding of some sort. You can experience heavy or prolonged periods or bleeding between periods because of:

Hormone imbalances

Hormone imbalances due to pregnancy, puberty, or menopause often play a major role in causing abnormal bleeding. Polycystic ovary syndrome (PCOS) is a condition that causes hormone imbalances because of an overproduction of androgens. In some instances, thyroid problems cause hormone imbalances leading to abnormal bleeding. 

Growths in the uterus

Uterine growths like fibroids or polyps, which are usually benign, cause abnormal bleeding for many women. 

Cancers of the reproductive system

A rare cause, cancer of the uterus or cervix, can lead to abnormal bleeding due to the cell changes in those regions. 

Other possible causes of abnormal bleeding include infections of the cervix, platelet dysfunction, and blood-thinning medications. 

How can I manage my abnormal bleeding?

With most underlying causes of abnormal bleeding, there are treatment options that either stop the bleeding or regulate your menstrual cycle so that the bleeding you experience is no longer abnormal. Dr. Fan’s experience includes surgeries, medication management, and procedures for conditions that cause abnormal bleeding, including:

  • Hormonal birth control pills
  • Hormonal intrauterine device (IUD)
  • Progestin shots or implants
  • Dilation and curettage (D&C)
  • Endometrial ablation
  • Uterine artery embolization
  • Hysterectomy


There is much to consider while choosing a treatment for abnormal bleeding, including the specific underlying cause and whether you want to get pregnant in the future. Dr. Fan explains all of your options in detail and helps you make the most appropriate decision for your treatment. 

Abnormal bleeding requires investigation by a trained gynecologist. Schedule your appointment over the phone or book one online with Yuan-Da Fan, MD, today.