Hormones are chemical messengers that affect almost everything in your body, from energy and sleep to mood, weight and your periods. It is normal for hormone levels to change through the month and across your life. This guide explains the main hormones in women’s health, common signs that something may be off, and what to ask your doctor.
The hormones that matter most for women
- Estrogen and progesterone control the menstrual cycle and support pregnancy. Estrogen also affects bones, skin and mood.
- Thyroid hormones set the pace of your metabolism, energy and body temperature.
- Cortisol is the main stress hormone. It follows a daily rhythm and rises when you are under pressure.
- Insulin helps your body use the sugar from food for energy.
- Testosterone is made by women too, in small amounts, and plays a part in energy, muscle and sex drive.
Common signs of a hormone imbalance
These symptoms have many possible causes, and hormones are only one of them. They are worth mentioning to a doctor, especially if several happen together or they are new:
- irregular, very heavy or missed periods
- tiredness that does not improve with rest
- weight gain or weight loss you cannot explain
- hot flushes and night sweats
- low mood, anxiety or irritability
- trouble sleeping
- acne, or extra hair on your face or body
- thinning hair
- a low sex drive
- often feeling much colder or hotter than people around you
How hormones change through life
Puberty and the teenage years
Periods can be irregular for the first year or two while hormone levels settle.
Pregnancy and after birth
Hormone levels change dramatically during pregnancy and fall quickly after birth, which can affect mood. Tell your midwife or doctor if low mood lasts more than two weeks after your baby is born.
Perimenopause and menopause
Perimenopause usually starts in your 40s, when estrogen levels begin to fall unevenly. Periods become irregular, and symptoms such as hot flushes, sleep problems, brain fog and mood changes are common. Menopause is when you have not had a period for 12 months in a row, most often between the ages of 45 and 55.
Conditions that affect hormones
Common ones include polycystic ovary syndrome (PCOS), an underactive or overactive thyroid, and diabetes. They are diagnosed with a check-up and blood tests, and they can be treated.
Everyday habits that support hormone health
Lifestyle changes cannot fix a medical condition, but these habits support your body’s natural balance:
- aim for 7 to 9 hours of sleep, with regular sleep and wake times
- eat regular, balanced meals with protein, fiber and healthy fats
- be active most days, including some strength training
- find ways to manage stress, such as walking, breathing exercises or talking to someone
- limit alcohol and do not smoke
Hormone treatments: what to know
If your symptoms are caused by a hormone problem, a doctor may suggest treatment, for example thyroid medicine, or hormone replacement therapy (HRT) for menopause symptoms. HRT can work very well for hot flushes and night sweats and helps protect your bones, but it is not right for everyone, so talk through the benefits and risks with your doctor.
Be cautious with clinics that sell “hormone optimization” packages, custom-mixed “bioidentical” hormones or hormone pellets with big promises about weight loss, energy or anti-aging. Custom-mixed hormones are not tested and regulated in the same way as approved medicines, and the dose can vary from batch to batch.
What to ask your doctor
- Could my symptoms be linked to my hormones, or to something else?
- Which blood tests make sense for me, and when in my cycle should I have them?
- Could I be in perimenopause?
- What are the benefits and risks of treatment for me?
- What can I change in my daily routine to help?
The bottom line
Many common symptoms, from tiredness to irregular periods, can be linked to hormones, but they can have other causes too. Keep a note of your symptoms and your cycle, and talk to your doctor, who can check what is going on and discuss safe, proven treatment if you need it.
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