Glucose screening and tolerance tests during pregnancy. A glucose screening test is a routine test during pregnancy that checks a pregnant womanâs blood glucose (sugar) level. A glucose tolerance test is done if a glucose screening test result is higher than normal. It is used to diagnose gestational diabetes. Gestational diabetes is high blood sugar (diabetes) that starts or is found during pregnancy.
The Arctic tern is known to make the longest annual migration in the animal kingdom. During its breeding season, it is found far to the north where summer days are long, and it winters far south in the southern hemisphere, where the days are longest during November to February.he Arctic tern is notorious for its long-distance migration between the breeding grounds and the winter quarters in the Southern Ocean. This knowledge has been obtained by ringing and observations of movements at-sea.
They nest among rocks and cliffs. The nests are made up of shells and debris or of dead vegetation. Clutch size is 3, on average, and the chicks hatch in 3 to 4 weeks. Young fledge in 27 to 30 days. Common tern chicks are able to fly by the time they are a month old but do not reach sexual maturity for 3 years.ommon terns are found from northern Canada south to the Caribbean Sea, as well as throughout Europe, Northern Asia, North Africa, and the Middle East. Some populations of common terns winter in the south to Peru and Argentina. (Ehrlich, et al., 1988; Malling Olsen and Larsson, 1995).