Estrogen usually gets the attention in menopause conversations, but progesterone is doing real work too. Supplementing progesterone is a central part of many hormone replacement therapy (HRT) regimens because it works with estrogen to support your body’s functions.

But what does taking progesterone do for women in menopause, exactly? Let’s explore its role in the body and why you still need it as you age.

Progesterone’s life cycle

Progesterone is a hormone your body naturally produces. Post-ovulation, the empty follicle (the sac that released the egg) undergoes a transformation called luteinization. It becomes a temporary gland known as the corpus luteum. The corpus luteum produces most of your body’s progesterone in your reproductive years. 

If you aren’t pregnant, the corpus luteum breaks down after around two weeks post-ovulation. Progesterone falls with it, triggering your menstrual period. But if pregnancy does occur, the corpus luteum continues producing progesterone for around eight weeks.

As the corpus luteum breaks down around week eight, the placenta steps in and becomes responsible for progesterone production throughout pregnancy. Notably, your adrenal glands also produce progesterone during your reproductive years and beyond, including small amounts in menopause. 

How progesterone changes in menopause

Premenopause spans all reproductive years prior to perimenopause. Perimenopause is the stage leading to menopause, generally starting in the 40s. Menopause is a single day, marked when you’ve gone 12 consecutive months without a menstrual period. Postmenopause is all that follows that day. 

Here’s what’s happening to progesterone in each stage: 

• Premenopause: Progesterone naturally rises with ovulation. Otherwise, levels rest at a low baseline (if pregnancy doesn’t occur). 
• Perimenopause: Ovulation becomes inconsistent in perimenopause. This causes progesterone to fluctuate unpredictably. 
• Postmenopause: Ovulation stops. Progesterone settles at a low baseline because only the adrenal glands produce the little that remains. 

Symptoms of low progesterone 

Why is progesterone important even after menopause? A helpful way to answer this is by looking at the effects of low progesterone, which can include: 

• Menstrual period irregularity: In perimenopause, ovulation becomes unpredictable, which dysregulates progesterone production. Irregular progesterone production translates to irregular menstrual periods and bleeding. 

• Difficulty sleeping: The body converts progesterone into allopregnanolone, a neurosteroid that makes you drowsy. As progesterone declines, so does allopregnanolone production, which can hinder sleep. 
• Vasomotor symptoms: Vasomotor symptoms (VMS) include hot flashes and night sweats. Changes in progesterone may affect these symptoms, but more research is needed to connect the dots.

This isn’t an exhaustive list of potential symptoms. Progesterone may be linked to others, like mood changes and bloating. Your doctor or menopause specialist will look at your full health picture to determine if low progesterone may be contributing to your experiences. 

Taking progesterone in menopause: Treatment options 

HRT is a first-line menopause intervention. The Menopause Society, a leading authority on menopause, highlights it as the most effective treatment for VMS and genitourinary syndrome of menopause (GSM). 

There are two main HRT types, known as ET and EPT: 

• Estrogen therapy (ET) delivers estrogen alone.
• Combined estrogen-progestogen therapy (EPT) delivers estrogen and a progestogen.

Progestogen is an umbrella term that includes progesterone and progestins. Progesterone is the hormone your body naturally produces. Some HRT products include bioidentical progesterone, which is chemically identical to natural progesterone. Others include progestin, a synthetic compound that mimics the role of progesterone in the body. 

In HRT, estrogen by itself can promote the abnormal thickening of the uterine lining. This may increase endometrial cancer risk. In a three-year trial involving 358 postmenopausal women with a uterus, 64% taking estrogen alone developed hyperplasia (abnormal thickening of the uterine lining). This is compared to just 6% of those also taking a progestogen.

Progestogens regulate the uterine lining’s growth, offsetting estrogen’s effects. That’s why ET is almost exclusively prescribed to people without a uterus.

Beyond endometrial protection: Progesterone’s benefits

A 2026 review argues that progesterone’s benefits are often overlooked. Pooling research on this hormone’s clinical outcomes, here’s what the researchers found: 

• Sleep: Progesterone may support deep sleep and decrease the time to fall asleep. It might also reduce sleep disturbances. 
• Vasomotor symptoms: Progesterone may limit both the frequency and intensity of hot flashes and night sweats.
• Bone health: Progesterone may stimulate osteoblasts, which are cells responsible for building new bone. 

Progesterone might also provide certain cardiovascular benefits, such as supporting healthy blood vessel function. But further research is needed to validate this link. 

Is progesterone supplementation safe?

Yes. Progesterone supplementation is safe for most women when prescribed appropriately. But there are risks worth knowing about, including the following side effects:

• Headache
• Breast tenderness
• Depression
• Dizziness
• Bloating
• Drowsiness

Each side effect tends to be short-lived and mild. If yours are persistent or severe, your doctor will guide your next steps. 

Contraindications 

Contraindications are conditions or circumstances that make a medication unsafe for use. Here are Prometrium®’s contraindications:

• Allergy or hypersensitivity to Prometrium®’s ingredients
• Undiagnosed abnormal genital bleeding
• Breast cancer
• Deep vein thrombosis or pulmonary embolism
• Arterial thromboembolic disease
• Liver dysfunction or disease

Doctors also generally advise against using Prometrium® in pregnancy, but this is no longer a formal contraindication. HRT products that contain estrogen carry additional contraindications, reflecting estrogen’s risk profile. Before prescribing, your doctor will screen for any risk factors. 

Holistic, evidence-based hormone care

Wondering if HRT makes sense for you? Maven Clinic’s team of women’s healthcare specialists can provide answers, placing you on the right path for your body. Our patient, Dara, shared her experience: "The holistic view and approach for managing perimenopause and menopause have been life-changing!”

Read more about our approach to hormone care.