If life begins at conception, like the nutters claim, that makes every male trans, because every fetus beings as a female and later, at week 6-7, transitions to male or stays female depending on chromosomes.
It's not entirely accurate to say that every fetus starts as a female, because while every fetus does start with a set of "XX" chromosomes, which is the genetic makeup of a female, the ultimate biological sex of the fetus is determined by a complex interplay of the father's genetic, hormonal, and environmental factors.
It's more accurate to say both males and females start out with the same basic body plan in utero. The default body plan can be considered sexually undifferentiated. This means that the structures that will later become male or female reproductive organs have not yet formed.
Around the seventh week of gestation, the fetus begins to develop male or female reproductive organs based on the presence or absence of certain hormones. If the fetus has a Y chromosome, it will develop testes, which produce testosterone and other hormones that lead to the development of male reproductive organs. If the fetus does not have a Y chromosome, it will develop ovaries, which produce estrogen and other hormones that lead to the development of female reproductive organs.
So, to summarize, every fetus starts with an "XX" chromosome makeup, but the ultimate biological sex of the fetus is determined by the sex chromosomes contributed by the sperm at the moment of conception.
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