A 10 mL fetomaternal hemorrhage in an Rh-negative woman with an Rh-positive baby indicates that the:

The situation described involves an Rh-negative mother and an Rh-positive baby, with a fetomaternal hemorrhage of 10 mL. In such scenarios, the presence of Rh-positive blood from the fetus in the mother's circulation can trigger the mother's immune system to produce antibodies against Rh-positive blood cells.

When evaluating the options, the rosette test is a screening test used to detect Rh-positive fetal cells in the maternal circulation. If the test is positive, it indicates that Rh-positive fetal cells are present in the maternal circulation, which is consistent with a fetomaternal hemorrhage. In this case, the positive rosette test supports the conclusion that there has been a transfer of fetal blood to the mother’s bloodstream, which is what is expected given the hemorrhage stated.

The antibody screen will likely be positive for anti-D only if the mother has been sensitized due to previous exposures; however, the question does not provide direct information regarding previous pregnancies or transfusions, thus focusing on the presence of fetal cells is more pertinent here.

On the other hand, the options regarding the mother being a candidate for Rh immune globulin and the recommendation for doses would depend on specific clinical guidelines and the extent of sensitization. Since a fetomaternal