Menopause Hormone Therapy (HRT) in Fontana, CA

Bioidentical hormones in Fontana: what it means

"Bioidentical" describes a hormone whose chemical structure matches one the body makes. Estradiol and micronized progesterone are both bioidentical: their structure matches the hormones the ovaries make. FDA-approved versions of both are sold by prescription at retail pharmacies.

Many products sold as "bioidentical hormones" or "BHRT" are compounded instead: mixed by a pharmacy for one prescription, often as a custom cream or a pellet. None of these is FDA-approved, and the FDA has not reviewed them for safety, effectiveness or quality before sale. In the FDA's words, it has no evidence that compounded "bioidentical hormones" are safe and effective. When the National Academies reviewed them in 2020, the evidence was mostly low quality, such as anecdotes and patient reports.

For women in Fontana, a physician licensed in California can prescribe estradiol (pill, patch, cream or vaginal) and progesterone when they fit your history. There are no pellets. Because the dispensing pharmacy also compounds, you can ask whether your estradiol or progesterone is an FDA-approved product. Two options are compounded for certain: testosterone cream for women and Bi-Est are not FDA-approved.

For its size, Fontana is well supplied with OB-GYNs: the NPI registry lists 57, or 26.9 per 100,000 residents, against 17.8 for the US and above California's 16.9. That is about 440 women aged 45 to 64 for each OB-GYN in the city, a ratio rather than a count of open appointments.

Supply stays thin beyond the city line: 81 OB-GYNs within 10 miles and 365 within 25, only 10.7 per 100,000 of the 3,419,155 people who live in that radius, under the US 17.8. Whether or not you have an OB-GYN, you can ask a physician licensed in California about menopause hormone therapy online from Fontana, with no waiting room.

Then there are pellets, implanted under the skin at a clinic; compounded pellets are not FDA-approved. The Endocrine Society points to a study that found hormone levels well above the expected range in women using them. ACOG advises FDA-approved hormone therapy over compounded preparations.

Sources: FDA: Menopause · FDA: National Academies study of compounded bioidentical hormones (2020) · Endocrine Society position statement on compounded bioidentical hormones (2019) · ACOG Clinical Consensus No. 6, compounded bioidentical menopausal hormone therapy (2023) · CMS NPPES NPI full file, 2026-10-11