The measurements of your belly helps the doctor know if you have a big or small baby without having to do an ultrasound.
You could just have a small baby and you'll probably make up for it later in the pregnancy I was small at first and by the time I was seven months I was huge and made up for the beganing
I'm 27 weeks n a first time mom so I really wouldn't know, some people have posted before that they were a week or so ahead or behind n that they end up measuring on point later on. I bet they wanna look at baby to make sure baby is healthy n that it's nothing major. I wouldn't stress to much about it yet.
Ok, what would be some reasons?
I heard your suppose to take how many weeks u r add 2 then subtract 2 from it n ur belly should measure between those numbers. Like you would be 24cm-28cm so I think he just wants to see why ur measuring smaller