Testing fetal cells for chromosomal abnormalities like Down syndrome or cystic fibrosis.
Checking for the presence of harmful bacteria or viruses in cases of suspected intrauterine infection. The Procedure at a Glance
Measuring alpha-fetoprotein levels to detect conditions like spina bifida.
Becomes a mixture of fetal urine, lung secretions, and exfoliated fetal cells.
Mostly water and electrolytes derived from maternal plasma.
According to WebMD , the fluid is dynamic and changes as the pregnancy progresses: