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  1. #1
    Dream Vet

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    Odds of having boys, girls, mixed gender family- old statistics thread by lindi

    If the "odds" of a family of two being 2 boys being just slightly over 25%, two girls is just slightly under 25%, and 1 boy/1 girl being just about 50%, (that's correct, right?) what are the ACTUAL population statistics?

    I guess what I'm after is- is there proof that some couples are really "set" to produce one gender? If so, the boy/boy, girl/girl families would be above what the mathematical odds are, right?

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    I am not sure of odds or actual statistics, but I pay A LOT of attention to gender make up of families and I know of many more families of single gender than mixed. I would go as far as saying mixed gender families make up only 25-30% from my observations in the area I live.

  3. #3
    chachamama
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    I notice the gender makeup of families too - can't help myself I guess :P

    I know a LOT of 2-child families that are same gendered. I see less 3-child families (since so many people stop at 2!) but I'd have to say that from my observation, I see a lot of mixed 3-child families - mostly BGG or GBB, but also BBG and GGB. I don't see as many where the opposite gender is in the middle.

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  5. #4
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    Yes! They did study it and found that the gender ratio was NOT what should be statistically expected. That's why scientists study gender ratio, because it does deviate from what is statistically expected. (I'll delve into my papers and find the actual numbers for you.)

    Shockingly, research has shown that the actual number of baby boys to girls conceived, is actually 140-160 boys for every 100 girls!! WAY, WAY more boys than girls are conceived, but so many more boys are miscarried, that at birth, the ratio is 106-100.
    !!! Questions?? Check out the NEW and improved Complete Index !!!

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    For 2-Children Families

    All Boys - the real number was 25.8% (25.0% Predicted)
    Mixed genders - 52.2% Actual (50.0% Predicted)
    All Girls 22.0% Actual (25.0% Predicted)

    So right away, you can see that it's more common to have two boys than it is 2 girls, by more than 3%!!!

    3-Children Families
    All Boys 14.9% Actual (12.5% Predicted)
    Mixed 73.0% A (75.0% P)
    All Girls 12.1% Actual (12.5% Predicted)


    4-Children Families
    All Boys 9.1% Actual (6.3% Predicted)
    Mixed 85.4% A (87.4% P)
    All Girls 5.5% Actual (6.3% Predicted)

    Four boys are more common than four girls by a whopping 4%!!

    And in every category, mixed gender families were less common than they technically "should" be.
    Last edited by atomic sagebrush; January 8th, 2017 at 02:04 PM.
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    Quote Originally Posted by atomic sagebrush View Post
    Yes! They did study it and found that the gender ratio was NOT what should be statistically expected. That's why scientists study gender ratio, because it does deviate from what is statistically expected. (I'll delve into my papers and find the actual numbers for you.)

    Shockingly, research has shown that the actual number of baby boys to girls conceived, is actually 140-160 boys for every 100 girls!! WAY, WAY more boys than girls are conceived, but so many more boys are miscarried, that at birth, the ratio is 106-100.
    Now THAT's crazy!! Guess those y's have a HUGE advantage gettin' to that egg!

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    Quote Originally Posted by atomic sagebrush View Post
    For 2-Children Families

    All Boys - the real number was 25.8% (25.0% Predicted)
    Mixed genders - 52.2% Actual (50.0% Predicted)
    All Girls 22.0% Actual (25.0% Predicted)

    So right away, you can see that it's more common to have two boys than it is 2 girls, by more than 3%!!!

    3-Children Families
    All Boys 14.9% Actual (12.5% Predicted)
    Mixed 73.0% A (75.0% P)
    All Girls 12.1% Actual (12.5% Predicted)


    4-Children Families
    All Boys 9.1% Actual (6.3% Predicted)
    Mixed 85.4% A (87.4% P)
    All Girls 5.5% Actual (6.3% Predicted)

    Four boys are more common than four girls by a whopping 4%!!

    And in every category, mixed gender families were less common than they technically "should" be.
    Thanks! This really is fascinating. Doubling up on my sway efforts! Looks like swaying for a DD is THIS HARD for a reason!

  12. #8
    Coccinelle33
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    everyone i know has boys and girls or a boy and a girl.

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    Quote Originally Posted by atomic sagebrush View Post
    Yes! They did study it and found that the gender ratio was NOT what should be statistically expected. That's why scientists study gender ratio, because it does deviate from what is statistically expected. (I'll delve into my papers and find the actual numbers for you.)

    Shockingly, research has shown that the actual number of baby boys to girls conceived, is actually 140-160 boys for every 100 girls!! WAY, WAY more boys than girls are conceived, but so many more boys are miscarried, that at birth, the ratio is 106-100.
    This is what I point out to people when they rudely tell me "poor you, 4 girls!!" I tell them no actually we are very lucky and very blessed to get 4 girls!!!!
    Fathers Day baby!


    Busy Mummy of 5 now working from home: www.oz.scentsy.com.au

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    My sister had one boy and three girls after the boy. She is definitely blessed because the odds are stacked against girls.

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