In a G2P1, Rh negative mother with previous history of hydrops fetalis, now ICT is positive at 20 weeks. What is the next line of management?
**Core Concept**
The scenario describes a situation where a Rh negative mother is at risk of developing hemolytic disease of the newborn (HDN) due to previous exposure to Rh positive blood, as evidenced by a history of hydrops fetalis. Intrauterine transfusion (IUT) is a critical intervention in managing severe fetal anemia.
**Why the Correct Answer is Right**
The presence of ICT (intrauterine transfusion) positivity at 20 weeks indicates severe fetal anemia. Given the mother's previous history of hydrops fetalis, it is essential to prevent further hemolysis. The correct answer involves administering antibodies against RhD to the mother to prevent further sensitization and to reduce the risk of hemolysis. This is achieved by administering anti-D immunoglobulin (RhIg) at 28 weeks and post-delivery.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant as it does not address the severe fetal anemia and the mother's previous history of hydrops fetalis.
**Option B:** This option may be a distractor but does not directly address the management of the current situation. While it is essential to monitor the mother's sensitization status, it is not the next line of management.
**Option C:** This option is incorrect as it does not address the severe fetal anemia and the mother's previous history of hydrops fetalis.
**Clinical Pearl / High-Yield Fact**
It is essential to administer anti-D immunoglobulin (RhIg) to Rh negative mothers at 28 weeks and post-delivery to prevent further sensitization and reduce the risk of hemolysis. This is a critical aspect of managing Rh incompatibility.
**Correct Answer: A. Administer anti-D immunoglobulin (RhIg) at 28 weeks and post-delivery.**