A 28-year-old woman at 16 weeks' gestation being screened for ABO incompatibility learns that her blood contains anti-A antibodies. What should the nurse explain about this finding?

Question

1. "You may have contracted anti-A antibodies as a result of a viral infection."
2. "It's most likely that you contracted anti-A antibodies through sexual activity."
3. "Anti-A antibodies are inherited; usually, they are genetically passed down from father to daughter."
4. "Anti-A antibodies occur naturally, as a result of exposure to foods and different infections."

Answer 1

4
Explanation:
1. Women develop anti-A and anti-B antibodies as a result of exposure to the A and B antigens through infection by gram-negative bacteria and not viruses.
2. Anti-A and anti-B antibodies are naturally occurring; that is, women are naturally exposed to the A and B antigens through the foods they eat and through exposure to infection by gram-negative bacteria. These antibodies are not contracted through sexual activity.
3. Women develop anti-A and anti-B antibodies naturally as a result of exposure to the A and B antigens through the foods they eat and through exposure to infection by gram-negative bacteria. These antibodies are not inherited.
4. Anti-A and anti-B antibodies are naturally occurring; that is, women are naturally exposed to the A and B antigens through the foods they eat and through exposure to infection by gram-negative bacteria.