Fimbriae (common pili) and flagella on the surface of bacterial cells. Left: dividing Shigella enclosed in fimbriae. The structures are probably involved in the bacterium's ability to adhere to the intestinal surface. Right: dividing pair of Salmonella displaying both its peritrichous flagella and its fimbriae.
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.
Tightening of the stomach in early pregnancy? How early does your stomach start to tighten in pregnancy? I am thinking I am only 3-4 weeks along. is it possible that this could be happening this soon in pregnancy? I also would like to know how soon cramping occurs?