Development of the endocrine system alpha cells. The insulin concentration within the fetal pancreas is 3.6 pmol/g at seven to ten weeks, which rises to 30 pmol/g at 16–25 weeks of gestation. Near term, the insulin concentration increases to 93 pmol/g. The endocrine cells have dispersed throughout the body within 10 weeks. At 31 weeks of development, the islets of Langerhans have differentiated. While the fetal pancreas has functional beta cells by 14 to 24 weeks of gestation, the amount of insulin that is released into the bloodstream is relatively low. In a study of pregnant women carrying fetuses in the mid-gestation and near term
Ryan Langerhans for the Round Rock baseball team. During his senior year, Langerhans signed a letter of intent with the University of Texas, however, after being drafted by the Atlanta Braves, Langerhans went straight to professional baseball. Langerhans made his professional debut in 1998 with the rookie-level GCL Braves of the Gulf Coast League. He batted .277 with 41 hits, 10 doubles, 4 triples, 2 home runs, and 19 RBIs. In 1999, Langerhans was promoted to the Class-A Macon Braves of the South Atlantic League. In 121 games, Langerhans batted .268 with 120 hits, 30 doubles, 1 triple, 9 home runs, 49