Displaying 3 results of Norgestrel Stable Isotopes Norgestrel is a synthetic progestin hormone used in various hormonal contraceptives. Stable isotopes of Norgestrel are isotopes that do not decay over time and are used in scientific research to study the metabolism, pharmacokinetics, and pharmacodynamics of the drug. These isotopes are labeled with a stable carbon or hydrogen atom and are useful in tracing the fate of the drug in the body.