Hypothalamic Amenorrhea. Amenorrhea simply means the absence of menstruation (one or more missed menstrual periods), and it can be caused by a variety of things, including problems with the reproductive organs or hormones.
Normality is an ambiguous measure of the concentration of a solution. It needs a definition of the equivalence factor, which depends on the definition of equivalents. The same solution can possess different normalities for different reactions.
Noun. 1. heterosexuality-a sexual attraction to (or sexual relations with) persons of the opposite sex. heterosexualism, straightness. sex, sex activity, sexual activity, sexual practice-activities associated with sexual intercourse; they had sex in the back seat.