Trans people & sports

[Tiberius]

Not that it's all too relevant, but this is simply not true. A person's biological sex is determined at conception by the presence or absence of the y chromosome. Males were never female in the womb.

That's an extremely narrow view of biolgical sex. Genes may or may not get expressed throughout a lifetime or are expressed at certain times. This is why babies do not grow beards for example. There is also a stochastic mapping from genotype to phenotype. The Y chromosone also isn't devoted to sexual differences and encodes many other things as well.

It's like saying that no matter how badly you follow the recipe for souffle, you will always end up with a souffle, even if what you end up with is indistinguishable from a loaf of bread.

I think you have an extremely unscientific view of biological sex to be honest. What Catholic Lady said was correct. The XY sex-determination system is a legitimate system for determining biological sex in humans. At the moment of conception a baby has either XX or XY chromosomes that determine the biological sex of the baby.

https://en.wikipedia.org/wiki/Sexual_dif..._in_humans

A baby’s genetic sex is determined at the time of conception. When the baby is conceived, a chromosome from the sperm cell, either X or Y, fuses with the X chromosome in the egg cell, determining whether the baby will be genetically female (XX) or male (XY).

A fetus doesn't develop sexual organs until the 7th week after conception, but lack of sexual organs doesn't mean the fetus isn't genetically either a boy or a girl.

There are of course some exceptions for intersex and hermaphrodites, but I can't find anything that supports your claim that humans are conceived as "females" before turning into males.