Direct Answer
Progesterone is a hormone produced primarily by the ovaries after ovulation. It balances estrogen, supports sleep, reduces anxiety, and maintains the uterine lining. Low progesterone — common in perimenopause, after ovulation problems, and with chronic stress — causes symptoms including anxiety, sleep disruption, irregular or heavy periods, mood instability, and worsening PMS. A blood test on day 21 of the menstrual cycle (or any time in postmenopausal women) can assess progesterone levels.
What Does Progesterone Do?
Progesterone is produced by the corpus luteum after ovulation and, during pregnancy, by the placenta. Its primary roles include preparing the uterine lining for implantation, maintaining early pregnancy, and balancing the proliferative effects of estrogen on the uterus. Beyond reproduction, progesterone has calming effects on the nervous system (it converts to allopregnanolone, which acts on GABA receptors), supports deep sleep, and has anti-inflammatory properties.
Symptoms of Low Progesterone
Low progesterone is often described as 'estrogen dominance' — not because estrogen is necessarily high, but because the balance between the two hormones is disrupted. Symptoms include anxiety and irritability (especially in the second half of the menstrual cycle), difficulty falling or staying asleep, heavy or irregular periods, spotting between periods, worsening PMS, and breast tenderness. In perimenopause, progesterone typically declines before estrogen — which is why many perimenopausal symptoms appear years before hot flashes begin.
How Is Low Progesterone Diagnosed?
Progesterone is best measured on day 21 of a 28-day cycle (7 days after ovulation), when levels should be at their peak. In women with irregular cycles, timing the test is more complex. Postmenopausal women can be tested at any time. A comprehensive hormone panel — including estradiol, progesterone, testosterone, DHEA-S, and thyroid markers — provides the full picture needed to guide treatment.
Treatment Options for Low Progesterone
Bioidentical progesterone (oral micronized progesterone, such as Prometrium, or compounded progesterone cream) is the most common treatment. Oral progesterone taken at bedtime has a sedating effect that can improve sleep. Progesterone cream is absorbed transdermally and may be preferred for women who experience side effects from oral forms. Synthetic progestins (like medroxyprogesterone acetate) are not the same as bioidentical progesterone and have a different side-effect profile.
Frequently Asked Questions
Can low progesterone cause anxiety?
Yes. Progesterone converts to allopregnanolone, which acts on GABA-A receptors in the brain — the same receptors targeted by anti-anxiety medications. When progesterone is low, this calming effect is reduced, which can manifest as anxiety, irritability, and difficulty managing stress.
Can low progesterone cause weight gain?
Low progesterone can contribute to fluid retention and bloating. It also affects thyroid function and insulin sensitivity indirectly. However, weight gain in perimenopause and menopause is multifactorial — estrogen, cortisol, thyroid, and metabolic changes all play a role.
Is bioidentical progesterone safer than synthetic progestins?
Current evidence suggests bioidentical progesterone (micronized progesterone) has a more favorable safety profile than synthetic progestins, particularly regarding breast tissue and cardiovascular effects. The WHI study used medroxyprogesterone acetate — a synthetic progestin — not bioidentical progesterone.
Can I get progesterone testing in Orlando?
Yes. Rejuvenate & Wellness Center in Hunter's Creek, Orlando offers comprehensive hormone panels including progesterone on a self-pay basis. No referral required. Our FNP-BC reviews your results and creates a personalized treatment plan.
Related Questions
Get Your Progesterone Levels Checked in Orlando
Marc Pierre-Louis, FNP-BC specializes in women's hormonal health. Same-week appointments in Hunter's Creek, Orlando.
14050 Town Loop Blvd, Suite 202 · Orlando, FL 32837 · (321) 294-3586