Progesterone Levels: Normal Ranges Through Menopause

Your progesterone levels follow an ever-shifting rhythm through your life. The hormone rises and falls throughout your menstrual cycle, peaking each month around the middle of the cycle’s second half. In pregnancy, progesterone continuously increases until around the third trimester. And in perimenopause, it becomes more erratic and then declines, eventually reaching a low once you’re in menopause.

Despite all these ups and downs, you may not have given much thought to progesterone. But once you reach perimenopause, this hormone suddenly elbows its way to center stage. Progesterone is typically the first hormone to decline during perimenopause, and as it drops off, you may start to experience perimenopause symptoms like hot flashes, night sweats, mood shifts, and brain fog, among others.

When you start thinking about progesterone levels, you may wonder whether yours is high, low, or “normal.” The short answer? Because progesterone fluctuates so much, there isn’t one normal number, and a wide range can be considered acceptable. 

Let’s look more deeply at progesterone, the typical ranges by stage, when your clinician might test your progesterone, and what your results mean. And we’ll explain how a menopause-informed clinician, like one at Midi, can be your guide through the ups and downs of this life transition.

What Are Progesterone Levels, and Why Do They Matter?

First, let’s define progesterone: Along with estrogen, progesterone is one of the key female reproductive hormones produced by the ovaries. During your reproductive years, progesterone is busy regulating your menstrual cycle and, if you conceive, supporting a healthy pregnancy. 

Progesterone also has an indirect impact on GABA-A receptors, a type of chemical messenger in your brain. The body converts progesterone into a neuroactive metabolite that enhances GABA’s calming effects, which may promote relaxation and support restful sleep. This is one reason why taking progesterone as part of hormone therapy during menopause may help you sleep better.

Progesterone levels are sometimes tested as part of a fertility check-up, using a blood test that measures this and other hormones. The progesterone-specific results mostly matter if you’re trying to get pregnant (and possibly having trouble), or if your clinician is trying to determine your ovulation status, notes Midi Health physician Lily Hanna, MD. 

“Progesterone levels are usually checked if we're looking for ovulation,” Dr. Hanna says. “That tends to be more in the infertility world.” In perimenopause and menopause, she explains, it’s less critical to know an exact number.

As your progesterone level dips, you’re more likely to experience menopause symptoms. Taking hormone therapy that combines estrogen and progesterone can help improve some of the symptoms you’re experiencing.

What Is a Normal Progesterone Level at Each Stage?

Because progesterone levels fluctuate so much during your cycle and throughout life stages, a single point-in-time progesterone test isn’t usually considered reliable. And it’s not valid for evaluating perimenopausal or menopausal status. But here’s a typical range of what’s considered a normal progesterone level at different times: 

• Follicular phase (early in your menstrual cycle): Progesterone levels are usually low in this stage, typically less than 2 nanograms per milliliter (ng/mL) of blood.
• Luteal phase (after ovulation): Progesterone is produced by the corpus luteum (which temporarily forms in the ovary) to prepare the uterine lining for possible pregnancy, so levels rise sharply. They may peak at around 20 ng/mL.
• Pregnancy: If you conceive, progesterone levels increase throughout pregnancy, peaking as high as 300 ng/mL in the early third trimester.
• Perimenopause: Progesterone levels start to fluctuate unpredictably but decline overall as ovulation becomes less regular or doesn’t happen at all. 
• Menopause: Once you’ve officially reached menopause—meaning you’ve gone 12 months without a menstrual period–progesterone levels remain permanently low, possibly below 0.5 ng/mL.

If your levels are tested for some reason, keep in mind that the ranges may vary by lab and testing method and may not match the numbers above.

How Do Progesterone Levels Change During Your Cycle?

In a typical 21- to 35-day menstrual cycle, your progesterone levels rise and fall, but they typically follow a distinct pattern. Here’s what that usually looks like:

• The follicular phase begins on day 1 of menstruation. At this point, your progesterone is at its baseline low (around or less than 2 ng/mL).
• Ovulation is triggered by a surge in luteinizing hormone (LH). Your ovary releases an egg around day 14 in a 28-day cycle. If your clinician is testing your progesterone, they’ll probably do that soon: “Progesterone levels are usually checked if we're looking for ovulation, usually around day 21,” says Dr. Hanna.
• You enter the luteal phase immediately after ovulation if you don’t conceive. The ruptured follicle forms the corpus luteum, which secretes progesterone. Your progesterone level after ovulation rises as a result, increasing to around 15 to 20 ng/mL then peaking in the middle of the luteal phase at around 35 to 50 ng/mL.

After all this, menstruation comes again. If you didn’t conceive and the corpus luteum breaks down, progesterone levels plummet. This sudden drop in progesterone (and estrogen) triggers the shedding of the uterine lining, causing your period.

Sometimes in perimenopause, you might experience what’s known as an anovulatory cycle, which means your ovary doesn’t release an egg. (This might also happen before perimenopause in women who have difficulty getting pregnant.) In an anovulatory cycle, no corpus luteum forms, progesterone fails to rise, and the result is a surge in estrogen that’s unbalanced—which can lead to irregular, heavy, or prolonged bleeding.

Progesterone Levels in Pregnancy

Let’s say you conceived in that previous menstrual cycle. Instead of entering the luteal phase, your progesterone levels would start to continuously increase, and the hormone would play a number of major roles during the pregnancy: 

• Progesterone levels start to rise initially to maintain a thick uterine lining, which lets the fertilized egg safely implant and grow. In early pregnancy, up until around week 13, progesterone levels may be as high as 90 ng/mL.
• As your pregnancy continues, progesterone levels continue to climb, with the placenta becoming the primary source of progesterone. It helps suppress uterine contractions (which might trigger preterm labor) and prepare your breasts for lactation.
• By early in the third trimester, progesterone may have reached up to 300 ng/m—or possibly higher if you’re pregnant with multiples.

If you’re undergoing fertility treatment, are pregnant, or are trying to get pregnant, your OB/GYN or fertility specialist can help you determine whether your progesterone levels are in a typical range. 

How and When Should You Test Progesterone Levels?

Progesterone levels are tested using a simple blood test—but in perimenopause and menopause, “we don’t really test progesterone levels that often,” says Dr. Hanna. That’s because progesterone testing isn’t required to diagnose perimenopause or menopause, nor to prescribe hormone therapy. Since progesterone fluctuates continuously throughout the day and your cycle, a single blood draw reflects hormone levels at only one specific moment in time and can be misleading.

Generally, a healthcare professional will only test progesterone levels to see if you’re ovulating. This is sometimes called the day 21 progesterone level check because it happens around that time in your cycle, “but it actually depends on somebody’s duration of their menstrual cycle,” says Dr. Hanna—and keep in mind that cycles are often irregular in midlife. This test tends to be performed when someone is trying to conceive.

Progesterone testing may occasionally be used to assess whether ovulation is occurring in the setting of irregular periods, too. But again, it’s not used to diagnose perimenopause or menopause.

By the way: You may come across so-called at-home perimenopause tests. These are urine or saliva tests and aren’t as accurate or as clinically established as a blood test that a clinician uses. (And again, even blood tests give just a snapshot of one moment’s progesterone level.)

What Do Low Progesterone Levels Mean?

Progesterone and estrogen work together in delicate balance. When progesterone levels drop or fail to rise, the primary consequence is that your estrogen becomes “unchecked.” This can lead to heavy menstrual bleeding, frequent periods, or unpredictable spotting. Unopposed estrogen can also cause the endometrial lining to become too thick, which increases the risk of certain cancers. Low progesterone may also make you feel anxious or moody, or you might experience disrupted sleep.

So what does it mean if you do have low progesterone? Some of the most common causes include: 

• An anovulatory cycle, which means an egg didn’t release during ovulation. This can happen during perimenopause.
• Polyendocrine metabolic ovarian syndrome (PMOS, formerly known as polycystic ovary syndrome, or PCOS), a type of hormonal balance characterized by skipped or irregular periods. 
• Hyperprolactinemia, a non-life-threatening condition caused by high levels of prolactin in your blood.
• A slow or underactive thyroid, which can impact progesterone production.
• Extreme stress, which can raise levels of the stress hormone cortisol and affect progesterone production. (This happens as a result of ovulation being suppressed.) 

You may not know it if your progesterone levels are low. But some low progesterone symptoms in perimenopause can include irregular periods, insomnia, bloating, and headaches. And one 2022 study suggested that declining progesterone production (as well as other hormonal changes) may be associated with a greater chance of vasomotor symptoms like hot flashes. 

What Do High Progesterone Levels Mean?

Clinicians generally don’t evaluate progesterone levels on whether or not they’re too high—it's usually just to confirm ovulation. Progesterone levels naturally reach very high levels during pregnancy, and they’re elevated during your luteal phase. High progesterone levels are really only a concern when looking at potential side effects from exogenous progesterone taken during hormone therapy.

If you’re taking hormone therapy and your progesterone dose is too high or you have a progesterone sensitivity, you might experience symptoms of high progesterone in women:

• feeling sleepy, groggy, or hungover during the day
• having GI discomfort like bloating, abdominal fullness, nausea, and constipation
• feeling tearful, depressed, or anxious, especially if you have a progesterone sensitivity

If your clinician determines that you’re sensitive to progesterone or synthetic progestins, they may suggest you try a 1- to 2-week break from the medication. (Do this only if your clinician advises it.) Or they might suggest a switch from micronized progesterone to a synthetic progestin (or vice versa), a 52-milligram levonorgestrel IUD (Mirena/Liletta), or a vaginal micronized progesterone.

Why Is One Progesterone Test Less Useful in Perimenopause?

A single point-in-time blood test for progesterone is unreliable during perimenopause for several reasons. Mainly, progesterone levels can be typical one month and low the next, since irregular ovulation increasingly becomes the norm in perimenopause. You might have an ovulatory cycle one month—so, progesterone would spike in that luteal phase—and an anovulatory cycle the next, in which your progesterone might be near-zero. 

This means that one test won’t reflect the overall pattern. In fact, major medical societies and Midi clinicians don’t use single measurements of progesterone, estradiol, or follicle-stimulating hormone (FSH) to diagnose perimenopause or predict when menopause will occur. Instead, clinicians usually make decisions (such as whether to prescribe hormone therapy or other medications) based on your menstrual history, age, and symptoms. 

What Should Progesterone Levels Be on HRT?

Your serum progesterone levels don’t need to be tested when taking hormone therapy. The main reason a clinician will prescribe progesterone (or a synthetic progestin) is to protect the uterine lining from the effects of estrogen in women who have a uterus.

Your clinician will use a standard dosing schedule for progesterone along with estrogen, and if they need to adjust this dose, they’ll do so based on symptoms, not a blood test. The goal is to get symptom relief and protect your uterus.

If you’re experiencing signs of progesterone hypersensitivity—which is rare and may include skin rashes, hives, or wheezing—or hormone therapy doesn’t seem to be improving your symptoms, your clinician may opt to adjust the dose or type of hormone therapy.

When to Talk With a Clinician About Your Progesterone Levels

If you’re concerned about your progesterone levels, let your clinician know. And tell your clinician if you experience: 

• abnormal or very heavy bleeding
• cycles lasting shorter than 21 days or a flow that’s longer than 8 days
• unscheduled bleeding on hormone therapy
• any bleeding after menopause (this requires prompt in-person evaluation since it can be serious)

Perimenopause can be an overwhelming time, but treatments are available to help you manage symptoms. A menopause-informed clinician, such as one at Midi, can oversee your care with individualized treatments, and a whole lot of empathy. 

Key Takeaways

• Progesterone is a key reproductive hormone produced by the ovaries. It has a number of important roles in the body, including helping regulate your menstrual cycle and supporting a healthy pregnancy.
• Progesterone levels rise and fall throughout your menstrual cycle (they’re lower in the beginning, then increase through the luteal phase) as well as in different times of life (they’re higher in pregnancy, for example). Because this hormone fluctuates often, pinpointing a “normal” progesterone level really depends on where you are in your cycle and life stage.
• During perimenopause, progesterone levels gradually decline—once you’re officially in menopause, they reach a near-zero low. This contributes to many symptoms you experience during perimenopause, such as hot flashes, night sweats, insomnia, and irregular periods.
• As influential as progesterone is, the exact level doesn’t matter too much in perimenopause. A single blood draw reflects hormone levels at one specific moment and can be misleading, since progesterone changes continuously throughout the day and your cycle.
• If your clinician thinks you’d benefit from hormone therapy and you still have an intact uterus, your medication will include a combination of estrogen and progesterone or synthetic progestin. This is essential to protect your uterine lining.

Frequently Asked Questions (FAQs)

Is 32 a good progesterone level?

“Normal” progesterone levels depend on stage of life and where you’re at in your cycle. Early in your cycle, progesterone levels are low; they rise after ovulation and peak in the middle of the luteal phase. 

Is it better to have high or low progesterone?

Progesterone fluctuates throughout your life (it’s higher in pregnancy) and during your menstrual cycle (it’s lower early in your cycle, then increases). Low progesterone, which can occur during perimenopause, can bring symptoms like hot flashes, insomnia, and bloating. High progesterone is less common but might occur if you’re taking hormone therapy and have a progesterone sensitivity or your dosage is too high.

What level of progesterone is too high?

What’s considered high progesterone really depends on timing–for example, it’s normal to have higher progesterone levels in the luteal phase of your menstrual cycle, and they get much higher during pregnancy.

What does a progesterone level of 0.5 mean?

Progesterone levels fluctuate throughout the day and month, as well as depending on your life stage, so it’s hard to pinpoint a “normal” level. Levels gradually decline in perimenopause and may reach 0.5 ng/mL or below by menopause.

How can I raise my progesterone levels naturally?

Lifestyle steps that support ovulation may benefit progesterone production, such as getting a healthy amount of sleep and plenty of healthy nutrients. If you think your levels are low, speak with a clinician.