Phones that belong to the same phoneme, such as [t] and [tÊ°] for English /t/ , are called allophones. A common test to determine whether two phones are allophones or separate phonemes relies on finding minimal pairs: words that differ by only the phones in question.
Bioidentical hormone replacement therapy (BHRT), also known as bioidentical hormone therapy or natural hormone therapy, is a poorly defined term referring to the use of hormones that are identical, on a molecular level, with endogenous hormones in hormone replacement therapy.HRT is a form of alternative medicine, and has been promoted as a panacea for many diseases rather than a means of relieving the symptoms of menopause and/or reducing the risk of osteoporosis (the goals of traditional hormone replacement therapy).
The term bioidentical means the hormones in the product are chemically identical to those your body produces. In fact, the hormones in bioidentical medications may not be any different from those in traditional hormone therapy. Several hormone therapy products approved by the FDA and prescribed by health care providers contain bioidentical hormones. Natural means the hormones in the product come from plant or animal sources; they're not synthesized in a lab.