Which of the following contraceptive devices is having a common mechanism of action?

Options

A. Vaults and condoms
B. Cu T and Multiload 375
C. Progestasert and Cervical caps
D. Mala D and Lippes loop

Answer

To determine which contraceptive devices have a common mechanism of action, we will analyze the options provided:

1. **Option A: Vaults and Condoms**
- **Vaults**: These are caps placed over the cervix to prevent sperm from entering the uterus. They act as a barrier method.
- **Condoms**: These are barrier devices used either on the male penis or inside the female vagina to prevent sperm from reaching the egg.
- **Conclusion**: Since vaults and condoms work through different mechanisms (one is a cervical cap and the other is a barrier on the penis or vagina), this option does not have a common mechanism of action.

2. **Option B: Copper T and Multi-load 375**
- **Copper T**: This is an intrauterine device (IUD) that releases copper ions, which inhibit sperm motility and viability, thus preventing fertilization.
- **Multi-load 375**: This is also an IUD that works similarly by releasing copper ions to prevent sperm from fertilizing the egg.
- **Conclusion**: Both Copper T and Multi-load 375 work through the same mechanism of action as they are both IUDs that release copper.

3. **Option C: Progesterone SERT**
- **Progesterone SERT**: This is a hormonal contraceptive that primarily works by stopping ovulation. It does not work through a barrier or IUD mechanism.
- **Conclusion**: This option does not share a common mechanism with Copper T or Multi-load 375.

4. **Option D: Malady and Lipase Loop**
- **Malady**: This is an emergency contraceptive that works primarily by preventing ovulation or fertilization.
- **Lipase Loop**: This is another type of IUD that prevents fertilization by creating a hostile environment for sperm.
- **Conclusion**: Since Malady and Lipase Loop work through different mechanisms (one is hormonal and the other is an IUD), this option does not have a common mechanism of action.

**Final Answer**: The correct option is **B: Copper T and Multi-load 375**, as they both function as intrauterine devices with a similar mechanism of action.