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 The half-life of a radioisotope is the time required for half the atoms. & 2 nbsp &nbsp in a given sample to undergo radioactive, or nuclear, decay. 3  Half-life is given the symbol t&#189. 4  Different radioisotopes have different half-lives.