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.
It is the radioactive nature of these unstable atoms, usually referred to as 'radioisotopes', which gives them so many applications in modern science and technology. Their radioactivity means that they can be used as a tag to follow the movement of some material incorporating them.