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
Beatrice Islets about 7500 years ago when sea levels reached current levels. The islets are composed of sand and sandgrit. The islets is part of a drying spit at low water which falls to a depth of within about to the west. As of 1987 and again in 1996, the Beatrice Islets were reported as having no vegetation as a result of an exercise to remove the infestation of South African boxthorn. While sources dated 1987 and 1996 do not explicitly list fauna for Beatrice Islets, it is likely that fauna species which are exclusively birds reported as being present on The