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Can you tell if your baby is a boy or girl from just 12 weeks? We've all heard of the old wives tales like carrying your baby bump low means it's a boy or if you're craving sweet things, you're expecting a girl.

However, the nub theory claims to be a lot more accurate - and says you can even tell the sex of your baby just by looking at your 12 week ultrasound picture.

What is nub theory?

Between 11-13 weeks, all babies are said to have a 'nub' between their legs, and the angle of the nub will indicate whether it's a boy or girl.

It's said that if the nub is over 30 degrees up, it's a boy - but if it's under that then it's a girl. See our pictures below as an example.

 



Nub theory - girl picture

Girl nub: The nub isn't pointing up more than 30 degrees - in fact it's almost horizontal!

Nub theory - boy picture

Boy nub: The nub is at a much steeper angle upwards, indicating that this baby is a boy.

Going for your scan soon? You'll have to hope for co-operation from your baby - but if you can get a picture of them laying down on their side, that should provide you with a good view of the nub. 

More boy or girl predictors

- Chinese birth predictor
- Boy or girl quiz

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charlie

any idea of what my baby is this is at 13 weeks

Kursty Marie Cunniff

Got 2 boys already

Kursty Marie Cunniff

13weeks 5days

Kursty Marie Cunniff

Any ideas 13week 5 days thanks Kirsty

ash

Girl:)

smiler

Any guesses if the gender is boy or girl, please??

Chelsea

Leave a message...

Erin

Im not sure wot to think, i dont know what my scan pics looks more like. Its hard to tell Lets wait and see ha.

jammyminxy

At 20 week scan the hospital says it is a girl :)

jammyminxy

Defo a girl I would say - it looks like my scan which is a girl!

jammyminxy

Girl

Claire

Would you say boy or girl please? im 12 weeks 3 days :)

beth x

boy or girl guys????

natalie

i seen this in my last ultrasound at 11 weeks and 5 days. im confused?? not sure if its a penis or a nub?

jade

I'd say a girl. I have two girls.

jade

Hi any ideas on whether my scan is showing a boy or a girl ? Thanks

Tietiex

is the nub were im pointing to?

leigh

Hiya people any ideas on boy or girl. Many thanks

Guest

It's not allowing me to put a picture up anyone know why many thanks.

leigh

That looks like a girl to me it's the same as my first baby.xx

jammyminxy

Cheers thanks! Any more thoughts on todays scan at 15 weeks??

paige

could anyone tell me what they think im having please

Lgeyen

Any guesses?

Sarah Glover

Any ideas please?

Christina Jones-Jenkins

Looks girly

Christina Jones-Jenkins

Looks boyish

Christina Jones-Jenkins

First pic looks boy...second pic looks like mine girly. Im gona guess boy!

Jammyminxy

Can anyone tell if they think we are having a boy or girl, please? Thanks

Claire31

Any ideas? Boy or girl?!

Claire31

Any ideas? Boy or girl?

Christina Jones-Jenkins

Not letting me c thr pic

day13

Any guessers on my 11 week nub shot?

charlie

can anyone guess if its a girl or boy, this scan is at 13 weeks

Shannon

Any one plz help

Shannon

Anyone plz !! Really want to no

Shannon

Can any one help boy or girl plz

Shannon

I need to no mine help

emerald

any guesses boy or girl? thanks

emerald

Any guesses please boy or girl?

emerald

any guesses??? Girl or boy?

Kel x

Any ideas of the gender based on the nub theory please xx

danni10

boy

danni10

looks like a girl

danni10

boy/girl ??

danni10

can you see from the pic weather this little one is a boy or a girl

Guest

any ideas on boy or girl

Delilah

Girl

Delilah

This is the twelve wk scan of our fourth baby, after 3 boys we've been for gender scan today at 16 wksand this little one is a GIRL

Ivelisse Divine Reyes

Please help!! I can't tell.. Any guesses if it's a boy or a girl?

dooleyx

Boy or Girl???

elisa douglas

Hi was wondering if anyone has any ideas what we could be having? as i don't have a clue lol thank you :)

elisa douglas

Hi was wondering if anyone has any ideas what we could be having? thank you :)

миша кохт

babyy gender determination before birth and conception. Baby gender determination by photo of parents only. To do this I have an account and a group on Facebook. The group is called Baby gender by parents photo

Lynsey

Hi I know what I think it is, what do u think girl or boy, seems clear xx

Kat

Any ideas boy or girl?

mai

please guess, boy or girl?

kat

Please help - This is 12 weeks scan of my baby. Please guess the gender.

jammyminxy

Hospital have said its a girl :)

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