Why Images can be Hazy

 http://www.peekabooiseeu.com/

 it's very well  explained Why Images can be Hazy 

Images can be Hazy for a number of reasons. The 3 most common reasons are:

Placenta - The baby can be close to the placenta. The ultrasound waves still need to penetrate through the placenta (which is like a pillow) and can sometimes cause some haziness. The placenta cannot be moved out of the way. We hope you know of some ways to get your baby to move away from the placenta, but we still do our best to get you the best pictures as possible.

Amniotic Fluid - If the amniotic fluid surrounding the baby is cloudy, the 3d images will be hazy. This is why it is important to drink water throughout your pregnancy - not just the day of your ultrasound. Every 48 hours, the amniotic fluid is flushed. Therefore, if you can keep your amniotic fluid as clear as possible by drinking water, you will obviously end up with clearer pictures. Likewise, if your baby is running out of room and there is a lack of amniotic fluid surrounding it, the images can oftentimes be hazy.

Maternal Tissue - We recommend heavier women to come during a later stage in the pregnancy. Ultrasound waves need to pass through the mother's skin and underlying cells before it gets to the uterus and the fetus. The more tissue it needs to pass through, the more the ultrasound waves are bounced around (refracted), and the images bounce back as hazy. The less tissue the ultrasound waves need to pass through, the more direct the route from the probe to the fetus and back to the probe, resulting in clearer images.

Even so, your baby is very precious. Even the haziest of images are amazing to us!
Reprinted from this website:
http://www.peekabooiseeu.com/