If a pregnant woman is suffering from Rubella infection, then after delivery, which type of antibodies are present in her neonates?

Options

A. Ig M only
B. Ig G only
C. Ig M and Ig G
D. lg A and Ig G

Answer

To determine the type of antibodies present in neonates when a pregnant woman is suffering from a Rubella infection, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Antibody Types**:
- There are five main types of antibodies: IgM, IgG, IgA, IgE, and IgD. Each has a different role in the immune response.

2. **Role of IgG Antibodies**:
- IgG antibodies are known to be transferred from the mother to the fetus through the placenta. This transfer provides the neonate with passive immunity against infections that the mother has been exposed to.

3. **IgM Antibodies in Response to Infection**:
- IgM antibodies are typically produced by the immune system in response to a new infection. They are the first antibodies made by the body when it detects a pathogen for the first time.

4. **Scenario of Rubella Infection**:
- If the mother is infected with Rubella during pregnancy, she will produce IgM antibodies in response to the infection. However, the IgM antibodies do not cross the placenta.

5. **Antibodies Present in the Neonate**:
- Since IgG antibodies can cross the placenta, the neonate will have IgG antibodies present in their system after birth. The presence of IgM antibodies in the neonate would indicate a response to an infection, but in this case, the IgM produced by the mother does not reach the baby.

6. **Conclusion**:
- Therefore, after delivery, the neonate will primarily have IgG antibodies transferred from the mother through the placenta, while IgM antibodies would not be present unless the neonate itself was infected.

### Final Answer:
The type of antibodies present in the neonates of a pregnant woman suffering from Rubella infection will be **IgG antibodies**.