Please help with a friendly arguement :) Any links would be great too :)
2006-11-09 10:22:21 · 22 answers · asked by Lily 5 in Pregnancy & Parenting ➔ Pregnancy
In the early stages of life from conception until about 14 weeks, all human fetuses look the same, regardless of gender. At the tender age of 14 weeks post-fertilization , genetically-male fetuses begin to produce male hormones including testosterone. These hormones turn the androgynous fetus into a bouncing baby boy.
2006-11-09 10:32:32 · answer #1 · answered by MaeStar 2 · 6⤊ 0⤋
Male and female fetuses start out with the same primordial genitals in the womb. In order for the genitals to develop into testes you need the presence of H-Y antigen. Without it, the fetus goes on to become female. So female is the default outcome if the antigen is not present. Y chromosomes code for the H-Y antigen. Once the testes develop, they start producing testosterone, which stimulates the development of the vas deferens and seminal vesicles. The testosterone also suppresses the development of a uterus, fallopian tubes and a vagina. So again, for the fetus to become male you need extra factors present.
Not quite the same as "all babies are female," but there is a theory that female was the original for animals and the emergence of a male came from a mutation.
2006-11-09 10:33:32 · answer #2 · answered by braennvin2 5 · 7⤊ 2⤋
Sort of. The DNA is always male or female, but the genitalia start out looking alike...female. After the boy baby spends time in a testosterone "bath" the genitals develop the male characteristics.
2006-11-09 11:00:29 · answer #3 · answered by JordanB 4 · 0⤊ 2⤋
No.
Gender is determined - Immediately upon fertilization your little one is set as a boy or a girl. Ladies, this is one that you can't take credit for since it is up to the sperm to determine the sex of your baby. Sperm carries either a "X" (girl) chromosome or a "Y" (boy) chromosome. (*Hint:* You will have to hold off on picking out the pink or blue until at least the second trimester when the gender will be visible via ultrasound.)
2006-11-09 10:46:56 · answer #4 · answered by Miriam Z 5 · 1⤊ 2⤋
The mans sperm is the determining factor in the sex of the baby. A man has both X sperm and Y sperm. The sex of the baby is determined from the moment of conception. If an X sperm joins with the ovum then the baby is a girl. If a Y sperm joins with the ovum it's a boy baby. Hope that this helps.
2006-11-09 10:38:11 · answer #5 · answered by Crystal 5 · 2⤊ 1⤋
Both sexes start out with a nub and after a little growing time a girls goes down to become her vagina and a boys grows out to become his penis. Ask your doc if you want to know more they can show you pics of the fetus growing chart and you can see it on some charts.
2006-11-09 10:42:39 · answer #6 · answered by Anonymous · 1⤊ 1⤋
Possibly
2006-11-09 10:37:49 · answer #7 · answered by eddie_schaap 4 · 0⤊ 2⤋
If you'll check you'll find that the fetus does not have male organs at first but develop later. I think it has to do with testosterone levels but am not sure on that point. It is also why men have nipples.
2006-11-09 10:32:00 · answer #8 · answered by Anonymous · 2⤊ 2⤋
One time a mother put 2 kids in a bathtub to bathe, a boy and a girl. While playing with their toys, they begin to notice certain differences between each other. The girl asks the boy can I play with that toy between your legs. The boy says "NO WAY". When the girl asks why not, the boy replies, "BECAUSE, IT LOOKS LIKE YOU ALREADY BROKE YOURS".
2006-11-09 11:06:47 · answer #9 · answered by xoxo 4 · 1⤊ 1⤋
No a boy is a boy as soon as it is in the womb and a girl is a girl....
You can't start out as one gender and then change into another!!!
2006-11-09 10:31:47 · answer #10 · answered by TRUE GRIT 5 · 1⤊ 2⤋