Why does PCOD happen? Causes, insulin and hormones explained

If you have just been told you have PCOD, one question usually comes first. What did I do wrong? The honest answer is nothing. Genes, hormones and insulin all play a part, and you did not choose any of them.

This article explains how the pieces fit together. It is education, not a diagnosis. A doctor decides what is going on in your body.

There is no single cause

Doctors do not point to one trigger. Several things add up, and then they keep each other going, like a circle. Here is the loop in the order it usually runs.

1. Your cells respond poorly to insulin. This is insulin resistance.
2. The body makes more insulin to cope, so insulin runs high.
3. High insulin pushes the ovaries to make more androgens.
4. Extra androgens disturb ovulation, so the egg is not released on time.
5. Weight gain, especially around the belly, often follows and makes insulin resistance worse.

Then the circle starts again at step 1. That is why PCOD can feel stubborn. Each part feeds the next.

What adds up

Family history

If your mother, sister or aunt has PCOD or diabetes, you are more likely to have it too. A relative with PCOD does not mean you will definitely have it, and a woman with no family history can still be diagnosed. Genes load the dice a little. They do not decide the game.

Insulin resistance

Insulin is a key that lets sugar into your cells for energy. In insulin resistance the lock gets stiff, so the body makes more keys. All that extra insulin is a message to the ovaries to make androgens. Signs can include dark, velvety patches on the neck, skin tags, sugar cravings, belly fat and feeling sleepy after meals.

Extra androgens

Androgens are hormones every woman makes in small amounts. The ovaries make them, and so do the adrenal glands, two small glands that sit above the kidneys. When levels run higher, you may see acne, oily skin, coarse dark hair on the chin or upper lip, and thinning at the parting.

Low-grade inflammation

Some inflammation in the body is quiet. You will not feel it as pain or fever. It seems to keep insulin resistance going, and a blood test called hs-CRP is one way doctors look at it.

Lifestyle

Low activity, poor sleep, stress and extra weight can make the circle spin faster. Notice the wording. They can make it worse. They are not what started it.

Does junk food cause PCOD?

No. This is one of the most common myths, and it makes women feel guilty for no reason. Genes and hormones come first. Food still matters, because refined sugar and packaged snacks push insulin up and a steady plate keeps it calmer. So lifestyle helps you control PCOD, even though it did not cause it.

Lean women get PCOD too

PCOD is not only a condition of women who are overweight. Lean women can have PCOD and insulin resistance. If you are slim and your periods are irregular, or you have stubborn acne and hair growth, you still deserve proper tests. Being told to just eat less when you already eat well is both unhelpful and wrong.

You can break the circle at any point

Here is the good news. You do not have to fix everything at once. Change one link and the others loosen.

• Food that keeps sugar steady lowers the insulin push.
• Movement makes your cells listen to insulin again. Even a 10-minute walk after meals helps.
• Better sleep and calmer days settle the stress hormones that interact with insulin.
• If you carry extra weight, losing even 5 to 10% of your body weight can bring back regular ovulation and periods. For a woman who weighs 70 kg, that is roughly 3.5 to 7 kg.

Avoid crash diets. They backfire, and they are not part of any sensible plan. Medicines are chosen for your goal, for example regular periods, clearer skin or a pregnancy. Lifestyle stays the base.

Names that point to the same family

You may hear PCOM, PCOD, PCOS and PMOS. Doctors now see these as steps on one spectrum, from a scan finding only (PCOM) to a whole-body hormone and metabolic condition (PCOS). PMOS, short for Polyendocrine Metabolic Ovarian Syndrome, is the new official name for PCOS. It was chosen because the condition involves insulin, many hormones and metabolism across the whole body, not only the ovaries. Your doctor may use either name.

What a doctor checks

Thyroid and prolactin problems can look like PCOD, so they are always tested. Doctors use your history, your blood tests and a pelvic scan. A diagnosis needs two of three signs, after other conditions are ruled out. If you have two or more of the usual symptoms, or one that bothers you, see a doctor. Bring a note of the first day of each period for the last few months. It helps more than you would think.