Thank you for the explanations. Not using the term bioidentical makes complete sense to me. I'm still wrapping my head around the term synthetic.

"All hormones are made in a lab." That's exactly why I would've thought calling them synthetic progesterone/synthetic estradiol is correct, to distinguish them from a natural progesterone/natural estradiol. Chemically they are identical but how they're made is different.

After reading that article, apparently I was also confused by the term synthetic. I always thought it meant "made in a lab" but your article defines it as "not found in nature". Is that the standard definition from a pharmaceutical perspective?