Amnio

In late pregnancy, it can be tested for surfactant levels to assess if the baby's lungs are developed enough for delivery.

Checking for the presence of harmful bacteria or viruses in cases of suspected intrauterine infection. The Procedure at a Glance

Testing fetal cells for chromosomal abnormalities like Down syndrome or cystic fibrosis. In late pregnancy, it can be tested for

Medical providers analyze this fluid during an procedure (typically between weeks 15 and 20) to check for:

Measuring alpha-fetoprotein levels to detect conditions like spina bifida. Medical providers analyze this fluid during an procedure

Mostly water and electrolytes derived from maternal plasma.

Healthcare providers at institutions like Johns Hopkins Medicine or The Mayo Clinic follow a standard protocol to ensure safety: Amniocentesis - Mayo Clinic In late pregnancy

According to WebMD , the fluid is dynamic and changes as the pregnancy progresses: