or Connect
Mothering › Groups › October 2013 Due Date Club › Discussions › Nub theory

Nub theory

post #1 of 17
Thread Starter 

Hey ladies, I thought it might be fun to have a place to post our sonogram pics and take some guesses at the nub theory! So just post your pictures and we can all have some fun trying to guess!


Here's my ultrasound from today, I'm 12 weeks 3 days :)





I can't wait to see everyone's ultrasounds!!!

post #2 of 17
I don't see the nub.
So I vote girl.
post #3 of 17




Here is my precious wee baby! Thinking boy? What does everyone think????

post #4 of 17
Thread Starter 
I agree, Danielle smile.gif boy!

I wonder if my baby's lack of a noticeable nub could mean I have a little girl in my future?
post #5 of 17

Dahlia, I see the nub in the middle picture.  It seems tilted up.  Angle of the dangle would say boy!

Danielle, I think it's a girly nub.  Seems parallel or actually pointed down when compared with the lower spine, to me!  Girl!!!


Those are my guesses.  :)

post #6 of 17

smile.gif Thanks so much Serafina! That's one all. Dh would certainly like a wee girl. I'm happy either way just dying to know. Only 6 weeks to go. 

post #7 of 17

I am in so much amazement that you all can see details in these pictures. I find them so fuzzy that I really don't know what I'm looking at. Most of the time I'm just like, "Well, I know that part is the head!"

post #8 of 17
Thread Starter 

Sphinxy, I'm terrible at it too actually lol. I still can't find the nub in my own ultrasounds

post #9 of 17

Angle of the dangle

On ultrasound, if your baby is cooperating and is positioned in a favorable way, fetal sex can be determined during a scan when the fetus is about 12 weeks (about 14 weeks after LMP).

The determination is made by studying the angle between the genital 'bump' and the direction of the lower portion of the spine. The following images are not typical and intermediate forms do exist, establishing gender can sometimes be difficult.  

12 week old fetus - (Fetus size = 3 inch, 75 mm) - 14 weeks pregnant
Male gender
Male 11weeks

With the male fetus, the genital tubercle usually creates an angle of greater than 30° with the lower part of the spine.

Male 11 weeks

Male 12 weeks
  Female gender
Female 11weeks

In the female fetuses, the genital tubercle protrudes in the same direction as the lower portion of the spine with an angle of less than 30° relative to the backbone.

Female 11 weeks

Female 12 weeks
post #10 of 17


post #11 of 17
Thread Starter 
The nubs are so easy to see in those pictures.. I feel like mine are still really hard to tell, and can't find anything that stands out as the nub on my sonogram. I understand the theory, it's just finding the nub sometimes that's hard.
post #12 of 17

Ohhh fun! I don't think we'll get one at 12-14 weeks. But can't wait to see everyone else's!

post #13 of 17
Thread Starter 



Serafina and any other guessers :) is that what you'd consider the nub?

post #14 of 17

nope, its all the way at the top, before legs/feet

post #15 of 17
Thread Starter 

I can't see legs/feet lol... the umbilical cord is the part reaching up to the top of the picture

post #16 of 17

So we ended up having an ultrasound at 13 weeks after all and my little ones nub is cropped from the picture! I can't even try to make a guess. Darn. Haha.

post #17 of 17

I'm getting an u/s at 15 weeks 1 day and I'm curious to see if the tech will actually be able to tell the sex- he says he can and my midwife says he's the best.... so we'll see!!! I really hope GIRL! I'm visualizing seeing 3 white lines. 

Mothering › Groups › October 2013 Due Date Club › Discussions › Nub theory