The Menopause ClinicYour micronized progesterone

Micronized Progesterone

Micronized progesterone (often called MP) is a form of natural, bioidentical progesterone — chemically identical to the hormone your body makes. It is processed into very small particles ("micronized") so it absorbs well when taken by mouth. It is different from progestins, which are synthetic.

How to take it

Take the medication each evening, exactly as prescribed. Most people find it works best between 6–8 PM, but you can adjust the timing to fit your schedule.

Because progesterone can be calming and help with sleep, taking it right at bedtime may cause morning grogginess for some people. Dosing earlier in the evening often avoids this.

Why progesterone matters if you have a uterus

Estrogen is very effective at relieving menopause and perimenopause symptoms, but when taken alone it can cause the uterine lining (endometrium) to thicken. Over time, this raises the risk of endometrial hyperplasia and endometrial cancer.

Progesterone keeps the uterine lining stable, prevents the overgrowth that estrogen can cause, and reduces that risk while you are using estrogen. This is why estrogen and progesterone are usually prescribed together if you have a uterus — they work as a team.

Why it can still help if you do not have a uterus

Even without a uterus, micronized progesterone may be beneficial for sleep and mood symptoms during perimenopause and menopause.

Sleep. Research shows micronized progesterone can help you fall asleep faster, improve overall sleep quality, increase deep (slow-wave) sleep, and reduce time awake during the night — including improvement in night sweats and sleep disruption.

Mood. It may also help with anxiety, mood instability, and depressive symptoms during the perimenopause transition. A randomized clinical trial found that transdermal estrogen combined with intermittent micronized progesterone reduced the risk of developing depression in perimenopausal and early postmenopausal women.

Everyone responds differently

Progesterone affects everyone differently. It is not common, but in some women it can worsen mood. If you notice your mood getting worse after starting it, let us know right away — we can make a change. You do not need to wait it out or push through it.

Possible side effects

Most people tolerate micronized progesterone well. Possible side effects include:

• Breast tenderness
• Bloating
• Drowsiness or dizziness
• Morning grogginess (often improved by dosing earlier in the evening)

If you notice bothersome side effects or changes in how you feel, please reach out.

If progesterone isn't working for you

Most women do well on progesterone, but about 25% of people using hormone therapy have some difficulty tolerating the progesterone component. Symptoms may include mood changes or irritability, bloating, or GI symptoms.

If it isn't working for you, do not just stop taking it. There are many options — a different form of progesterone, a different dose or schedule, or a progestin-releasing IUD that protects the uterus without daily medication. Stopping on your own can leave the uterine lining unprotected if you are also taking estrogen. Contact us instead, and we will find an approach that works for you. There is almost always another option.

A few notes for perimenopause

If you do not have a uterus, or you have a hormonal IUD placed within the last five years, progesterone is not required for uterine protection — but it may still be beneficial for some symptoms. You may still choose to use it for sleep, mood, or cycle-related symptoms. Keeping a symptom journal or notes can be very helpful for dose adjustments.

When to contact the clinic

Reach out if you experience persistent or worsening side effects, new mood symptoms, excessive sedation or dizziness, or if you have questions about timing or about continuing or adjusting therapy.

Before you start

Before starting any medication, please read its full guide. Understanding how to use your treatment and what to expect makes it work better and helps you feel confident. All of your medication guides are available with your Care Guides — and you can always ask us if you can't find what you need.

Key takeaways

• Micronized progesterone is a natural, generally well-tolerated form of progesterone.
• It protects the uterus when estrogen is used.
• It may improve sleep and mood, even without a uterus.
• It affects everyone differently — tell us right away if your mood worsens, and we can change course.
• Ongoing communication helps us tailor treatment to you.