There are no commonly used tests that detect silicone in breast milk. Several scientific studies have been done in the past, looking at even the older generations of silicone gel implants, and even those were not shown to have detectable levels of silicone in breast milk. Furthermore, studies done on infants drinking milk with silicone or using silicone pacifiers, or even eating baby food which sometimes has some silicone in it as a result of lubricating processing equipment, show no adverse effects on the baby. Thus, we have not felt a great need to actively pursue such a study because its usefulness is questionable in most people's minds.The second point I would like to make, which is probably more important than the first, is that cohesive gel implants don't leak. They are essentially a solid piece of silicone gel contained within a silicone rubber shell, and even if the shell is completely cut in half, the cohesive gel maintains its form and will not leak like a liquid. Therefore, we should all get the mental picture of a ruptured or torn implant leaking its gel all over into the body out of our minds. If you have a concern about your implant, the best thing to do is visit your surgeon so that a proper evaluation can be performed and you can be properly advised about what to do from there. Good luck.