You may need a backup method of birth control if you have vaginal intercourse during the seven days after a missed pill. Some backup methods are the condom, female condom, diaphragm, or sponge. You can also use emergency contraception (morning after pill) up to five days after unprotected intercourse.
Strontium-90, a radioactive isotope, is a by-product of nuclear reactors and present in nuclear fallout. It has a half-life of 28 years. It is absorbed by bone tissue instead of calcium and can destroy bone marrow and cause cancer. However, it is also useful as it is one of the best high-energy beta-emitters known. It can be used to generate electricity for space vehicles, remote weather stations and navigation buoys.
What is Strontium? Strontium is a common element which is naturally found in your bones. Studies show supplementation with Strontium in its various forms is well tolerated and completely safe. Strontium lies directly below calcium on the periodic table of elements and that makes calcium, strontium and magnesium all in the same chemical family. They are all naturally occurring metals found in the soil, in foods, and in your body.