When you're expecting a baby, the gender guessing game can be an exciting one. With so many theories and old wives’ tales available at the click of a mouse, it's easy to become swept up in trying to determine your child’s sex, but can you really tell whether to paint your nursery pink or blue from your scan pictures? Dr Geetha Venkat, Director of the Harley Street Fertility Clinic sets the record straight.

12 week scan

When it comes to your dating scan, usually performed at around 12 weeks, Dr Venkat is sceptical about the likelihood of an accurate prediction. “12 weeks is rather early and even an experienced sonographer could not confidently identify the sex of a baby at this stage,” she states. “The ideal time to look into this is during the 14th or 15th weeks of pregnancy when the baby’s sexual organs have grown to a point at which they can be correctly identified.”

“Up until this point, these look very similar and spotting whether they are internal or external can leave the results inconclusive, hence why it is vitally important to do this at the right time to avoid any inaccurate outcomes. At the proper stage within the pregnancy, a boy’s testacies and penis can be seen clearly and so can a female’s labia.”

Rumours and myths

On message boards and internet forums, rumours abound on how to predict your child’s gender from scan images, a popular theory being ‘the angle of the dangle’. In the early stages of your pregnancy, the foetus’ genitalia, regardless of gender, can be seen as a small protuberance in the groin area. Many mums-to-be are convinced that the angle that this nub is resting at, at their 12-week scan, can determine the sex of the child.

According to Dr Venkat however, this doesn’t really carry any scientific weight. “As mentioned before, up until a certain point a male and female baby’s sexual organs will look very similar,” she points out, “so telling if they are protruding or internal is very difficult until they are sufficiently developed.”

Factors that affect your scan

When you do go for a later scan, during which your sonographer should be able to confirm the baby’s gender if you wish, there are a few variables to take into account, according to Dr Venkat.

“Sometimes identifying the sex of the baby can prove very difficult if the baby is not co-operating. If their legs are crossed it is impossible to see the genitalia which obviously determine if the foetus is a boy or a girl. If this happens, it is a case of trying to encourage the baby to move. We have asked mums to go for a walk and come back to see if the activity helps the baby into a new position, which usually works and then we can try again!

“A good ultrasound machine is vital when looking clearly at a baby and imaging has become very sophisticated, even allowing parents to see their baby’s facial expressions. But having an experienced sonographer is also a must to ensure an accurate identification.”

Real mums share their gender prediction experiences on the Babyexpert forums

“We found out with our first that we were expecting a girl, but this time around we wanted to keep it a surprise but both me and my other half are sure we saw a willy at our 20 week scan. We’ll soon find out if we are right or not.” Hannahmummyto2

“It is hard to tell when you're not sure what you're looking at, and baby might have its legs crossed, or be moving around too much for you to get a good look so don't read too much in to it. I'm sure it'll be fun to look and speculate!!” lynz_81

“I was told my first was a boy, so I was very surprised when a beautiful baby girl popped out! I'm not sure what happened, I was told by the sonographer she was 80% sure it was a boy.” bride-carly-barleyx

“Depends which website you use as to what sex the baby will be! Some say use your age at conception, some say at birth and some say you have to use your age as in the chinese calendar which can be different... So basically nothing works except getting the sonographer to tell you!” diggys_mum

Do you want to find out whether you're having a boy or girl? Tell us below...

Fiona McKim 14/06/2013 14:46:00
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8 comments on this
Patrice Lowe
Silver member

26/07/2013 at 08:00

Yes one feels very eager whether a boy or girl is going to come. when I was pregnant for the first time I was also feeling eager and I also wanted to know whether a boy or girl will come. Actually it is difficult to wait for nine months .If this technology is available ,then why not to use it rather wait for nine months.
Platinum member

26/07/2013 at 09:32

I've heard about the nub theory and read and seen pics that confirm this to be true and correct but I guess it depends on getting the right shot and being able to see the nub. I have my 12 week scan on Monday but have a 4d scan booked for 18 weeks to confirm gender x

Silver member

20/09/2013 at 00:13

I would love to know if anyone can see the nub on my scan and tell me if they think it's pink or blue and why they think this please?

Platinum member

20/09/2013 at 12:57

I would say girl but don't take my word for it! I had a super boy nub and skull shape, am carrying like a boy and have all the boy old wives tales symptoms bit am having another girl x

Silver member

21/09/2013 at 01:12

Hi LH86

Thank you for your comment, much appreciated. Can I ask why you think girl?? can you see something on the pic?

Congratulations on another lil princess.  xx

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