Concentric contractions: A concentric contraction is a type of muscle contraction where the length of the muscles shorten while undergoing tension. For example, when you pick up a curl bar and perform a biceps curl, the length of your biceps muscles shorten.
Blood in Baby's Stool. Babies can sometimes have blood in their stool that is caused by food allergies, a small anal tear or fissure, or even a temporary case of lactose intolerance. It might even be a drop of blood that came from a cracked nipple, which the baby then passed through his system.
Blood in urine during pregnancy. The presence of blood in the urine (hematuria) during pregnancy may indicate serious problems. During pregnancy, blood in the urine may be due to gallstones or kidney stones. However, the most common cause of the presence of blood is the presence of a urinary tract infection. Here is an overview of the causes and symptoms of hematuria in pregnancy. Causes of blood in urine during pregnancy.