why do people say that if you have two boys its unlikey you will concieve a girl.....

[mum2sam]

ive heard that your chances are slimmer surely it should be 50/50 still just been trying to search the net to find any research on this.

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I saw a programme that said some men have a higher propotion of X or Y sperm so for them it would be more likely that all their children would be the same sex. The programme was about a couple who had 4 boys and 1 girl. The girl died in a fire and they wanted another girl. The dr said they would be unlikly to concieve a girl naturally because dads sperm was 90% Y or something so they went to Italy for gender selection and got loads of embryos but all were boys. Don't know if this is common or not.

My mum and dad had five boys before having me, so entirely possible to have 5 boys and then go on to conceive a girl.

Not sure I personally could cope with 6 kids though...

my mom has five girls but she lost twin boys after my eldest sister!

my 2 aunties have girl two boys each
my uncle has two boys two girls boy
my other uncle has girl boy.

its all dependent on what the egg cells said and the sperm cells iyswim

I've heard it's something to do with some womens cm being more suitable for male or female sperm, but who knows...

my mum was one of 4 girls and my dad one of 4 boys, they had me and my brother, i have two girls then a boy, I def know more people with 2 and 1 of a kind.

There are a very small number of people for whom it is easier to conceive and carry a certain sex.

For most of the population it is 50/50 (well 48/52 in favour of boys I think).

How deep a man ejaculates though is supposed to influence (I can't remember which way round) - so the fact that you have sex a certain way may make you slightly more likely to have same sex families.

TBH 2 boys is hardly convincing argument for having another boy scientifiically or statistically. If you had a family of 6 boys and 0 girls I would be more inclined to agree that this is an example of one of those families where boys are favoured over girls.

I did read somewhere that there is a theory that some women, if they have a boy first, develop antibodies that prevent them have girls.

I've jsut googled it, and it's not quite what I remembered: it's that having a boy first increases your risk of subesequent multiple miscarriage (might expalin my two missed miscarriages )

My Aunties had
3 boys
2 girls 2 boys
2 boys 1 girl
1 boy 2 girls

I've got 2 boys, no 3rd DC on the horizon

Dad has got 1 boy 2 girls

I'm a girl with 2 older brothers

I had 2 boys and then a girl, and know several other families who had the same.

Pretty bird I thought I havd seen that too - but didn't post it as I thought I had imagined it as I couldn't find it with google.

My dh's mum had two girls, then two boys, then a girl.

i def heard this too

in fact i even have a statistic in my head - only 20% chance of a girl if you have 2 boys

my understanding wasthat it doesn't work the other way - i.e. just as likely to have a girl as a boy afetr 2 boys

poss urban myth thouhg

My partner's family usually produces boys - only two girls have been born into his family in over 100 years (in the same period, there have been at least 25 boys). I had been persuaded that this is just a random sequence, but professorplum's explanation would also work. Explanations to do with the maternal biochemistry wouldn't work in my DP's case, as lots of different women from lots of different families have mated with these men, only to produce more boys!

I say 'only' to produce boys. Of course boys are totally fabulous.

I did a bit of research on this as I thought if you had 2 the same sex you were about 75% likely to have a third the same sex, this apparently isn't true, if you take a large enough proportion of the population it almost always comes out at 51/49% in favour of girls.

I do, however, believe that some families seem to have all girls and some all boys so there must be something in the sperm theories but for every girl family there must be a boy family to balance it all out.

IMHO you get what you are given and you should be thankful for each and every one of them, you can try and swing it one way or the other but nature will always decide for you (unless of course you get the sperm centrifuged and sorted or only put back one sex embryos) but you know what I'm saying.