What is Progesterone? Your Complete Guide
Progesterone is the hormone that prepares your uterus for pregnancy and maintains early pregnancy. It rises in the second half of the menstrual cycle (luteal phase). In men, it's present in very small amounts and is a precursor to other hormones.
💡Simply Explained
Progesterone is like a cosy blanket that your body prepares every month for a baby. It makes the inside of the uterus soft and warm, ready for a tiny baby to snuggle in. If no baby comes, the blanket is removed and a new one is prepared next month.
📏Normal Range
Typical reference range. Your lab may use slightly different values.
⬆️What High Progesterone Means
Possible Causes
- Pregnancy (natural and expected rise)
- Ovulation (mid-cycle rise is normal)
- Ovarian cysts (corpus luteum cyst)
- Adrenal gland overproduction
- Progesterone supplements or medications
Foods That Can Help
- No specific foods lower progesterone directly — focus on treating the underlying cause
- Maintain a healthy weight
- Reduce excessive dairy and meat if hormonal imbalance suspected
⬇️What Low Progesterone Means
Possible Causes
- Anovulation (not ovulating — common in PCOS)
- Luteal phase defect
- Extreme stress or excessive exercise
- Thyroid disorders
- Perimenopause (approaching menopause)
Foods That Can Help
- Vitamin B6-rich foods: bananas, chickpeas (chana), potatoes
- Zinc-rich foods: pumpkin seeds, sesame seeds (til), cashews
- Vitamin C-rich foods: amla, guava, oranges (supports corpus luteum)
- Chasteberry (vitex) tea — traditional remedy with some evidence
- Magnesium-rich foods: dark chocolate, almonds, spinach
🏃Lifestyle Actions
If Your Progesterone Is High
- If pregnant, high progesterone is expected — no action needed
- If not pregnant, investigate with ultrasound for ovarian cysts
- Follow up with your gynaecologist for proper evaluation
- Track your menstrual cycle to correlate with cycle phase
If Your Progesterone Is Low
- Track ovulation with basal body temperature or ovulation kits
- Manage stress levels — cortisol can suppress progesterone
- Ensure adequate sleep — progesterone is sensitive to sleep disruption
- See a gynaecologist if trying to conceive
- Discuss progesterone supplementation with your fertility specialist
🩺When to See a Doctor
High Progesterone
High progesterone in a non-pregnant woman with missed periods should prompt a pregnancy test first. If not pregnant, see a gynaecologist within 2-4 weeks to investigate ovarian or adrenal causes.
Low Progesterone
If progesterone is low during the luteal phase and you are trying to conceive, see a fertility specialist promptly. If you have recurrent early miscarriages, luteal phase progesterone testing is essential — see a gynaecologist urgently.
🎯Did You Know?
Progesterone literally means "pro-gestation" — in favour of pregnancy. It was one of the first hormones to be synthesised in a lab, and the discovery of synthetic progesterone led to the development of the birth control pill in the 1960s.
❓Frequently Asked Questions
What is Progesterone?
Progesterone is like a cosy blanket that your body prepares every month for a baby. It makes the inside of the uterus soft and warm, ready for a tiny baby to snuggle in. If no baby comes, the blanket is removed and a new one is prepared next month.
What is the normal range for Progesterone?
The typical normal range for Progesterone is 0–1 ng/mL.
What causes high Progesterone?
Pregnancy (natural and expected rise). Ovulation (mid-cycle rise is normal). Ovarian cysts (corpus luteum cyst).
What causes low Progesterone?
Anovulation (not ovulating — common in PCOS). Luteal phase defect. Extreme stress or excessive exercise.
How can I check my Progesterone levels?
You can check your Progesterone levels with a routine blood test. Upload your lab report to ScanHealth for an instant, plain-language explanation.
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Upload Your ReportThis guide is for informational purposes only and does not constitute medical advice. Reference ranges may vary by lab. Always consult a qualified healthcare provider for diagnosis and treatment.