Final answer:
Amniocentesis is used to evaluate fetal lung maturity, Chorionic Villus Sampling (CVS) for the early detection of genetic abnormalities, and Percutaneous Umbilical Blood Sampling (PUBS) for assessing fetal blood gas and acid-base status.
Step-by-step explanation:
To match the invasive fetal surveillance method to the correct advantage:
- Amniocentesis — C. Evaluation of fetal lung maturity.
- Chorionic Villus Sampling (CVS) — A. Early detection of genetic abnormalities.
- Percutaneous Umbilical Blood Sampling (PUBS) — B. Direct assessment of fetal blood gas and acid-base status.
Amniocentesis is a procedure where amniotic fluid is extracted from the amnion, providing access to fetal cells that can be analyzed for genetic health, including the evaluation of fetal lung maturity.
Chorionic Villus Sampling (CVS) involves the collection of chorionic villi cells from the placenta and is typically done earlier than amniocentesis, allowing for the earlier detection of genetic abnormalities in the fetus.
Percutaneous Umbilical Blood Sampling (PUBS), also known as cordocentesis, involves taking a blood sample directly from the umbilical cord or fetus to assess the blood gas and acid-base status, which provides direct information on the well-being of the fetus.