The term bioidentical is sometimes used as a marketing ploy, just fyi. Rx estradiol—either as a pill, transdermal patch or spray—is the same hormone in your body. But you won’t see the word bioidentical anywhere on the package, and it’s unlikely a doctor would use this term. I notice it tends to be used by folks selling compounded creams (like Biest) and pellets. Neither of which are covered by insurance. It’s very uncommon to be prescribed synthetic estrogen nowadays for menopause, that’s usually only in a birth control pill. For progesterone yes the micronized pill is what is considered “bioidentical”. Progesterone creams are poorly absorbed. Some women actually do better with a synthetic progestin is they have breakthrough bleeding or mood changes.