If you've heard the term PMOS recently and wondered what it means, you're not alone. PMOS, or Polyendocrine Metabolic Ovarian Syndrome, is the new name for what was previously known as Polycystic Ovary Syndrome (PCOS). The condition itself hasn't changed—but the name has.
The updated name was introduced by an international group of medical experts and patient advocates to better reflect what this condition really is: a complex hormonal and metabolic disorder that affects much more than the ovaries. The previous name often caused confusion because many women with the condition don't actually have ovarian cysts.
"Many women have heard of PCOS, but the name didn't always tell the full story," says Laura Muehling, certified nurse midwife at Riverside Women's Health. "This condition can affect hormones, metabolism, fertility, and overall health. The new name helps highlight that it's much more than an ovarian condition."
What Is PMOS?
PMOS is one of the most common hormonal conditions affecting women of reproductive age. It occurs when hormone levels become imbalanced, which can interfere with ovulation and affect many different systems throughout the body. It affects about 1 in 8 women worldwide.
Symptoms can vary from person to person, but may include:
- Irregular or missed periods
- Difficulty becoming pregnant
- Acne or oily skin
- Excess facial or body hair
- Thinning hair on the scalp
- Weight gain or difficulty losing weight
- Insulin resistance or prediabetes
Not every woman experiences the same symptoms, and some may have only a few. That's one reason PMOS can sometimes take years to diagnose.
Why the Name Change Matters
The new name is intended to improve understanding of the condition. While ovarian changes can occur with PMOS, they are only one part of the picture. The condition can also increase the risk of type 2 diabetes, high cholesterol, high blood pressure, and heart disease over time if left untreated.
"The name change reminds us to look at the whole person," says Muehling. "When we diagnose and treat PMOS, we're thinking about long-term health as well as menstrual cycles and fertility."
When to Talk to Your Provider
If you've been experiencing irregular periods, trouble getting pregnant, or symptoms like unwanted hair growth or persistent acne, it's worth discussing them with your healthcare provider. PMOS is diagnosed based on your symptoms, medical history, physical exam, and sometimes blood work or an ultrasound.
The good news is that PMOS can often be managed successfully. Treatment depends on your symptoms and your health goals. For some women, lifestyle changes can improve symptoms. Others may benefit from medications to regulate periods, improve insulin resistance, or support fertility.
"Every woman's experience with PMOS is different," says Muehling. "The most important thing is not to ignore your symptoms. The earlier we identify the condition, the sooner we can help you manage it and reduce your risk for future health problems."
Visit riversidehealthcare.org/womenshealth to learn more about women’s health services at Riverside and to schedule an appointment.