3D and 4D ultrasounds are optional. They're not standard prenatal tests. Doctors often give them as a courtesy to women who want them. Not all doctors have access to 3D or 4D ultrasounds. Also, your ...

Medical imaging’s come a long way in the past few decades—but it’s now so good that doctors can use it to tell the difference between a baby opening its mouth and it yawning. A team of researchers ...