A look at language related to periods and menstruation: Learn key terms regarding this aspect of women’s health, including symptoms, tests, treatments, and more.

Nitrogen (N) equilibrium isotope fractionation (15α) involving gaseous, dissolved, and solid phases of ammonia (NH3) and ammonium (NH4+) (e.g., NH3(g)–NH3(aq)–NH4+(aq)–NH4+(s)) represents a ...