The Third Gender

For transwomen, taking estrogens causes among other changes:

* The growth of breasts, with concomitant enlargement of the nipples.
* Redistribution of body fat.
* Thinning of skin.

For male-to-female transgendered people, HRT often includes antiandrogens in addition to the estrogens and progestogens mentioned above.

HRT does not usually cause facial hair growth to be impeded or the voice to change.

Irreversible changes
* breast development,
* enlarged nipples and areolae
* stretch marks (for some)

Reversible changes
* decreased libido,
* redistribution of body fat,
* reduced muscle development,
* various skin changes,
* significantly reduced body hair
* change in body odor and sweat production,
* less prominence of veins,
* ocular changes,
* gonadal size


Links:
Physical Attractiveness
Scientific American - Third Gender
BBC - Laos tackles transsgender taboos
Intersex Society of North America - Raising kids in a "Third Gender"?
My Husband Betty - en|Gender

Resources:
Gay Center
Callen-Lorde Community Health Center