We Were All Female... Once

Submitted by: PixelMitch 4 years ago Science

Sorry gents, but your manly bits used to be lady parts. Ever wonder why you have nipples?
There are 22 comments:
Male 150
Actually at about 6 weeks in development the embryo forms both mesonephric ducts (which will form the epididymis in males) and paramesonephric ducts (uterine tube in females) and one will degenerate depending on hormones (due to the Sex determining Region of the Y chromosome[SRY]), which is why if there is no Y gene or it is inactive the default gender is female. At this time the external genitals are identical in both males and females and are not fully differentiated (macroscopically) until week 20.
Lifted straight from an anatomy textbook, almost verbatim.
Your not gender neutral or female at that point, your both immature genders.
0
Reply
Male 7,123
I knew this in general terms, but it is well explained.
0
Reply
Male 13,624
Must explain why Im crap at finding things
0
Reply
Male 2,855
thats so gay
0
Reply
Female 6,381
Around 1:18, he mentions "If the Y chromosome does not become activated..." That`s how you can get XY females, like the late movie star Kim Novak. Infertile, but often very feminine. Makes you think.
0
Reply
Male 121
Known it for years. In the Chicago Museum of Science and Industry, there is or was a group of preserved fetuses on display that show different stages of human development. You might as well say we were all tadpoles once. Anyhow, at one stage, the genitals appear that they could go either way. The labial/scrotal and clitoral/penile structures are isomorphic and from their appearance, you could not say if it was going to be female or male. I saw the display when I was in middle school and never forgot it. Thirty years later, it was still there.
0
Reply
Male 5,413
Very interesting! :D
0
Reply
Male 593
Good now knowing this I can easily justify being a full blown PMS arsehole to all.
0
Reply
Male 582
ASSERT THROUGH DOMINANCE!!! and there goes that whole Adam & Eve theory.
0
Reply
Male 5,811
That`s pretty much all the Y chromosome is good for. It`s a short little chromosome with not much on it except for a few dozen genes.
0
Reply
Female 4
sry, looks like you`re having a boy! lol

sry gene
0
Reply
Female 2,228
Jurassic Park taught you that splicing the genes of a particular sex shifting frog w/ those of a dinosaur was a bad idea. Not that you were once female...
0
Reply
Male 37,888

Garden snails have 54 chromosomes and a potato has 48, 2 more than us.
Odd, huh.
0
Reply
Male 2,551
...my nipples aren`t that high up on my chest. Nor that large.
0
Reply
Male 3,060
Just because it`s not new info is no reason to shoot the video down. It was a very well done video, and I`m sure it could be quite informative for a curious middle-schooler.
0
Reply
Male 5,314
duh
0
Reply
Male 1,216
Some of us lack a good education system, so it`s nice that there are people taking their time to spare random facts (and earn money).
0
Reply
Female 1,516
@Klaxor - EXACTLY!
0
Reply
Female 9,402
I knew most of this stuff before, so this is nothing new.
0
Reply
Male 2,552
Why is this surprising? I learned this in middle-school science class...
0
Reply
Male 646
Jurassic Park taught me that
0
Reply
Male 61
Link: We Were All Female... Once [Rate Link] - Sorry gents, but your manly bits used to be lady parts. Ever wonder why you have nipples?
0
Reply