oMeds
All comparisons
Comparison · hormone optimization

Progesterone vs Progestin

Micronized progesterone is bioidentical to endogenous progesterone and is the modern default for endometrial protection in BHRT. Synthetic progestins (e.g. medroxyprogesterone) are structurally distinct molecules with different receptor and breast-tissue signaling.

Reviewed by Dr. Laura PurdyMay 29, 2026
Attribute
Micronized progesterone (bioidentical)
Synthetic progestin
Molecule
Identical to endogenous progesterone
Structurally distinct synthetic
Endometrial protection
Effective at standard dosing
Effective
Breast risk signal
Favorable signal in contemporary literature
Elevated signal in WHI-era data with CEE
Sleep effect
GABAergic metabolite supports sleep
Neutral to disruptive in some patients
Modern positioning
Standard in BHRT
Legacy; reserved for select indications
Pathway
BHRT
Not offered by oMeds
Choose Micronized progesterone (bioidentical)

Bioidentical micronized progesterone is the modern default for endometrial protection and sleep support in BHRT candidates.

Explore pathway
Choose Synthetic progestin

Synthetic progestins are legacy therapy outside the oMeds BHRT pathway.

Educational. Final pathway selection is provider-reviewed via synchronous video consultation against your biomarkers, history, and goals.

Frequently asked

Is bioidentical progesterone always better?

It is the contemporary default for most candidates due to favorable safety signal, but candidacy is provider-reviewed individually.

Does progesterone help sleep?

Its allopregnanolone metabolite has GABAergic activity that supports sleep onset for many women.

Next step

Take the optimization assessment.

The adaptive assessment maps your symptoms, history, and goals to candidate pathways — and routes you into provider review.

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