Is it true that all human fetuses are originally female, and thence the first human being is a female?

Question

Is it true that all human fetuses are originally female, and thence the first human being is a female?

References:
Does the Fetus Begin as Female?
http://userpages.umbc.edu/~korenman/wmst…

Additional Details

Thank you...

Answer 1

Best Answer - Chosen by Asker

Yes, the body naturally develops as female until testosterone is added to the developing fetus. That is the way with all mammal species

Asker's Rating:

Asker's Comment:

That is marvelous but...
...

thank you and everyone...

Answer 2

yes

Answer 3

i thought they all began as 'neutral' beings, with the possibility of becoming either, rather than starting right away as male or female. but what you said rings a bell....
sorry, i'm not sure!

Answer 4

All male cells contain X and Y chromosomes and all female cells contain X and X chromosomes (double crossed?) and thus male and female fetuses differ from the get-go. However, it is likely that the X and Y chromosomes of the male fetus produce more male hormones than the female causing modifications that differ from the female. Therefore your statement is partially true from that point of view.

Answer 5

2 things:
Yes, if the fetus contains a Y chromosome, the glands drop and become testicles. If not they remain inside the fetus and develop into ovaries.
2. "Thence"?

Source(s):

Thence ?

Answer 6

Yes that is absolutely true.

Answer 7

In very early development all humans are a neutral sex with no reproductive organs. Depending on if you have male (XY) or female (XX) chromosomes you will then differentiate into one of the sexes. The female form can be considered the default however (sort of), as the action of the Y chromosome is to prevent formation of the female reproductive tract and form testes which produce testosterone and create more male characteristics. However if a person had no sex chromosomes (which couldnt happen) they would not develop into a female, the developing foetus always requires some signalling which instigates the development of male or female characteristics.
Development is a very very complex process involving the activity of many different gene products which overlap and interact in different ways.
So really the first human being is not female - but has a 50-50 chance of being so

Source(s):

Im doing a medical biology degree and have done developmental courses

Answer 8

Before sexual development begins it's not really either. Some people will say it is female because it doesn't have a penis, but it doesn't have a vagina either. To be graphic about it, genital tissues in males or females spring from the same precursors. The clitoris and the penis both develop from the same structure; the labia and the scrotum do as well, etc etc. A developing fetus who has not yet reached the point of differentiating into a male or female will have tissues that could potentially turn into either set of parts; then at the right age, the genetics of sex kick in and the parts are steered towards male or female.

Don't use someone's homemade page as a reference - anyone can put what they want on the internet. Look for something a little more authoritative.

At any rate, your second question is also kind of moot. Fetal Development is not a mini-model for the history of the human race. So you can't draw any conclusions like that.