The primary role of progesterone is to balance the strong effects of estrogen. Progesterone metabolites are measured and reflect progesterone levels well because very little progesterone is found in urine, so b-Pregnanediol is typically used as a surrogate marker because it is the most abundant metabolite, but we also test the corresponding a-pregnanediol. The average of the two metabolites is reported for progesterone.
The total serum progesterone on the Dutch test is a calculated value based on urine pregnanediol. Progesterone has 2 primary metabolites: b-Pregnanediol and a-Pregnanediol. Each one of them represents about half of the progesterone that is being produced. If you are supplementing with oral/sublingual progesterone the serum correlation is not a valid concept.
What does Progesterone do?
- Helps with sleep and anxiety (alpha metabolites) via GABA-a receptors
- Antagonist to the mineralocorticoid receptor
- Prepares the uterus for implantation
- When pregnant, it decreases the maternal immune system to prevent attack on the fetus, the fall of progesterone on delivery triggers breast milk ‘let down’
- Its neurosteroid ALLO helps with sex drive
- Supports normal development of neurons in the brain
- Often given at high doses immediately after TBI or stroke to protect brain
- Enhances serotonin receptors in brain
- Reduces spasms and relaxes smooth muscle especially in the lungs/uterus
- Reduces gall bladder activity (high estrogen increased risk for GB disease)
- Often used as a medication to counter hyperplasia of uterine cells
PROGESTERONE LEVELS |
|||
SEX |
ng/ml |
nmol/l |
|
Females | |||
Follicular phase | 0.2-1.4 | 0.64 – 4.45 | |
Luteal phase | 4 – 25 | 12.7 – 79.5 | |
Post-Menopausal | 0.1 – 1 | 0.32 – 3.18 | |
Males | 0.1 – 1 | 0.32 – 3.18 | |
Conversion factor: 1 ng/ml = 3.18 nmol/l |
While variations in progesterone levels may be perfectly normal, sometimes a high reading is cause for further testing.
What happens if levels are low?
If levels are in the lower part of the reference range compared to estrogen levels, symptoms of too much estrogen may occur.
Reasons for low Progesterone:
- Not ovulating (determine why)
- Amenorrhea
- On hormonal birth control or recently stopped it/removed it
- Hypothyroidism
- Underweight/overtraining/anorexia
- PCOS
- Ovaries removed
- Ovulating but very weak corpus luteum tissue
- Age o Peri-menopause
- Menopause
- Suppression from opioids, aspirin and other NSAIDS, steroids
Causes of increased Progesterone levels in women:
- Progesterone supplementation
- Pregnancy
- Diffuse thecal luteinization
- Luteinized granulosa
- Theca-cell tumors
- Metastatic ovarian cancer
- High dose pregnenalone supplementation
Get a deeper understanding of your blood, urine, and stool test results.
$99 $79 per year
$6.60 per month billed annually
$15 per month
COVID-19 special offer!
$99 $79 per year
$250 single payment
At HealthMatters, we're committed to maintaining the security and confidentiality of your personal information. We've put industry-leading security standards in place to help protect against the loss, misuse, or alteration of the information under our control. We use procedural, physical, and electronic security methods designed to prevent unauthorized people from getting access to this information. Our internal code of conduct adds additional privacy protection. All data is backed up multiple times a day and encrypted using SSL certificates. See our Privacy Policy for more details.
16-OH-E1 (male), 2-Methoxy-E1 (male), 2-OH-E1 (male), 4-OH-E1 (male), a-Pregnanediol (male), a-Pregnanediol (oral progesterone range), b-Pregnanediol (male), b-Pregnanediol (oral progesterone range), Estradiol (E2) (male), Estriol (E3) (male), Estriol (E3) Postmenopausal, Estrone(E1) (male), Progesterone, Total Estrogen (male)