Silly question

westie27

Ok I really should know this, but the cm # on the ultrasound pictures, is that the size your uterus is measuring?

mswood1977

It may be the size of the area they are looking at, but I don't think it is the size of your uterus.

On my 10w3d u/s the cm # is 13.8 on 1, 14.6 on another, 14.1 on still another.  On my 14w4d u/s the cm# stays the same on all of them but it is 13.4 (smaller than any of my 10w3d numbers).

CraftyKayla

It's the amount of area that is shown in the u/s picture...

Hildietm

Not a silly question. That is the size of your little peanut in there!

westie27

Hmmm-so I'm extra confused now b/c I'm pregnant with twins. I just had an u/s done today at 10w3d, and the picture showing both babies just says 12 cm. The doctor said everything looked great, but now I'm confused. Just trying to figure out how big my babies are : )

Mama_B

Its the crown to rump length until @12-15 weeks they start making other measurements.  Later ultrasounds they will start measuring the spine, belly and head.

mswood1977

Hildietm:

Not a silly question. That is the size of your little peanut in there!

Unless my LO grew more than a CM during a single u/s it is not the size of the baby, as I had 3 different CM#'s during the same u/s. 

I am pretty sure it is the size of the area in the picture.

joshandpanda

CraftyKayla:

It's the amount of area that is shown in the u/s picture...

this...

the number will change if/when they zoom in/out.

has NOTHING to do with the fetus or ute or anything else.