A nurse is discussing various options for prenatal testing with a client who is at 7 weeks of gestation and has a family history of chromosomal abnormalities. Which of the following information should the nurse include?

A Coombs test determines cystic fibrosis.

Serum alpha-fetoprotein levels can assist in identifying neural tube defects.

A chorionic villi sampling will be performed during week 34 of the pregnancy.

Amniotic fluid screening identifies fetal bladder anomalies.