FWIW

Actually, science says you CAN change sex--look up sequential hermaphroditism.  There are several species that can change sex, including wrasses, clown fish, slipper limpets, male bearded dragons, coral, common reed frogs, and spotted hyena females.

As for humans, An individual with true gonadal hermaphroditism has both ovarian and testicular tissue, either in the same gonad (referred to as an ovotestis) or in one ovary and one testis. Some affected individuals have XX chromosomes, others have XY chromosomes, and others have a combination of both.

"Sex" is about who  you choose to go to bed WITH, "gender" is about who you go to bed AS.

If a woman born as female is unable to get pregnant by natural means, then isn't it science to use assisted reproduction methods like IVF or surrogacy? And isn't doing that a bit like playing God? If someone wants to change their gender, I don't see that it hurts anyone. Perhaps it would even help to control over population of the planet. Various non-human animal species exhibit behavior that can be interpreted as homosexual or bisexual. This may include same-sex sexual activity, courtship, affection, pair bonding, and parenting among same-sex animal pairs. Various forms of this are found in every major geographic region and every major animal group. 

That's science too.

Risa (Risa25) said...

Actually, science says you CAN change sex--look up sequential hermaphroditism. 

Per science, you cannot change sex. A true hermaphrodite is one of the rarest variety of disorders of sexual differentiation (DSD) and represents only 5% cases of all cases.

 True Hermaphrodite: A Case Report - PMC (nih.gov) In other words, it's a birth defect. You're born with both genitalia, but those cases are very very very rare, and one cannot change from male to female, but there are surgeries available to remove one or the other genitalia, but that isn't changing one's sex, it's removing one or the other genitalia. It's not adding any genitalia. (i.e. not changing sex).

On another note, does one removing a penis and replacing it with a vagina make that person a female? Medically, that's called a sex change operation, but it doesn't make that person a female. It only changes some of their sex organs.

Risa (Risa25) said...

Various non-human animal species exhibit behavior that can be interpreted as homosexual or bisexual. This may include same-sex sexual activity, courtship, affection, pair bonding, and parenting among same-sex animal pairs.

That's based around one's interpreted opinion... but I don't want to get into that because that is not science!

FWIW