Schedule of Prenatal Care. Specific schedules of prenatal care vary from provider to provider, but a general schedule follows below, as well as some of the screening tests or activities you might expect at various visits.
radioisotope. a radioactive form of an element, consisting of atoms with unstable nuclei, which undergo radioactive decay to stable forms, emitting characteristic alpha, beta, or gamma radiation. These may occur naturally, as in the cases of radium and uranium, or may be created artificially.
1 Naturally occurring and man-made radionuclides, also called radioactive isotopes or radioisotopes, are unstable, and emit radiation as they spontaneously disintegrate, or decay, to a stable state. 2  The radionuclide used almost always for the irradiation of food by gamma rays is cobalt-60.he Food irradiation process. The radiation used in processing materials is limited to radiation from high-energy gamma rays, X-rays and accelerated electrons.