infoplease has also created this page which summarizes Presidential and Vice Presidential Salaries from 1789 to the present. President George Washington, for example, was offered a salary of $25,000/year. http://www.infoplease.com/ipa/A0875856.html.
Pregnant mothers experience abdominal cramping as a normal sign during the first trimester of pregnancy but this can be otherwise a signal of an underlying problem. If cramps become intense and accompanied by severe bleeding and pain, or if one thinks she is not pregnant, consult a doctor immediately.
Relaxin's peak is reached during the 14 weeks of the first trimester and at delivery. It is known to mediate the hemodynamic changes that occur during pregnancy, such as increased cardiac output, increased renal blood flow, and increased arterial compliance.