I am sure that many of you have seen the study that showed that fraternal birth order is inversely correlated with homosexuality in men. The proposed explanation is that since testosterone doesn't occur in large amounts naturally in the female body, each male child contributes towards an immune response against testosterone in the womb. Each successive male causes a reduction of testosterone levels in future males, and so the biological changes instigated by these surges are interfered with over time.

There has been speculation but no proof that the same dynamic could be true for transexuality. Since I am the youngest of 4 brothers it certainly intrigues me. So I thought with your help I would do an utterly unscientific survey.

Should this count half-brothers and sisters, and is the importance about the siblings being from the mother or father or both?

My mother had 2 sons in her first marriage and then 2 sons and a daughter in her second relationship, so I am technically the fifth child of my mothers, but I am the third child in the relationship of my parents.  I am mtf.


[Edit:re-read qest. o.k its to do with the mother's womb, sorry duh!   ]


**My sister died when a baby before I was born.

One brother 10 years older; one sister 5 years older; one brother/sister (born of undetermantable gender, nurse said girl, doctor said boy) birth certificate said girl, death certificate said boy, never left the hospital 1 year older.

Me born during the war.


Sarah L.

I'm the eldest of two - my brother is four years younger than me and ULTRA-MALE. I swear, he's the guy-est guy I know.

That said, my mom has had a ... difficult time with pregnancy. I won't share the details because she talked to me about stuff in confidence, but I would have had an older sister, my birth and preceding pregnancy was complicated, as was my brother's.

Anyway, thought I'd share some data towards the sampling!   

I dont believe this is true to be honest..its a case by case thing in my opinion

The study on homosexuality was only brothers who shared a biological mother

Voted before I read the post explaining. I may have skewed your results slightly. I'm first born and FtM. It looks like you're probably only interested in MtF birth order from the explanation.

Dennis

I'm the only out of three that has a M on the birth certificate. I'm second in birth order but you are only counting boys right?  My mom separated from my dad for all of the pregnancy except for like a week. There was complications during my birth I guess I tried to hang myself with the umbilical cord.


Later,
Anna

First of three. Killing the results looks like. More ones than anything else, by 200% so far.

I'm the first child, the first grandchild, the first baby, the first everything....  Yes, I was very spoiled! (still am  >)

tink

Keep in mind that there are more first borned than second born than third born among all people. You have to factor those odds to get any kind of meaningful answer.

I'm first born of 3. I have 2 sisters.
First Grandchild on both side that is of about 45 children.
My father was first born of 3.

Jillieann

I was first born of 9. I've got 4 each of brothers and sisters. So far I'm the only one who had gender issues. And being 51, if any of the others is going to anounce having a sex change, they'd better get with it!

Karen Lyn

Only child

personally i believe that there are X number of ways to cause gender and sex preference issues.

Second born technically though 4th, between my sister and me there were two babies that did not make it, mom had alot of pregnacy issues.

Although i am seeing some results in pregnacy issues before birth of gender issued individuals.

What I seen is that birth male order influences if your gay but not TS.

I've seen a study lately where there was a definite relationship between
the female to male ratio in sibling of your mother and the probability of
being MTF.

My mother has 5 sisters and 1 brother...

Quote from: Keira on February 06, 2008, 06:54:36 AM
I've seen a study lately where there was a definite relationship between
the female to male ratio in sibling of your mother and the probability of
being MTF.

My mother has 5 sisters and 1 brother...

Now that IS interesting! My mom is the youngest of six sisters. Does that mean that, in amongst all my bigoted cousins might be a few more closet cases?  >

I am the second born of 2. I have an older brother who is quite tall and is nothing llike me physically. I am much smaller and not very tall.......but I don't think this topic is really related to any underlying transsexual feature's as everyone will have a different position in the birth line be it first or last...

Berleigh, we're talking probability here, not causality.

Having your mother have a much more female siblings than the 50% ratio is either dumb luck or linked to something in the genes. Especially if
it also happened in the previous generation. Say, if your grandmother
had many sisters and few brothers.

2 sister 1 brother, could easily be dumb luck, but 10 sister, 1 brother is
very unlikely, if it happens over many generations, well there is
something happening for sure since it couldn't happen
Unless there is something systemic that happens in
reproduction.


That same something can seemingly expressed in
some of the male offspring and thus cause TS to happen
in some of them (substantial probability of occuring,
though not a certainty).

With people having less and less children
(since 1 or 2 children is not enough to get a really
skewed ratio), it will be harder to get
information from the current generation, though looking at
our ancestry could help.

here's one for all of you, on both sides of my family i am in all reality, the ONLY grandson, the only nephew, etc. my mother(for absence of a real word that describes her) wanted three girls to piss off my mother's father. my grandma on my dads side had all boys, then they had all girls, until i was born. to this day that woman tells me the only reason i was born male is because my granmda got down on her knees and prayed every night that she would have a grandson, later i was born and spoiled until i was 2. then that woman got two of the 3 girls she wanted. and yeah i was born first, if that was deducted from my insinuation. i now have a wife who spoils me....lol



Mickie