A standard language variety is a variety that's recognized as more correct* and acceptable than other varieties. Standard varieties have the following prototypical properties, though not all of these properties will be shown by all standard varieties, and non-standard varieties may nevertheless have some of them:
All airlines make up their own rules and regulations regarding pregnant women. Some do not restrict travel at all, no matter what stage of pregnancy a women is in, and others start to restrict at 7 months, although the majority restrict around 36 weeks.
1 High altitude. 2  It is recommended that pregnant women avoid altitudes above 3,658 metres (12,000 feet). 3  For high-risk pregnancies and women in the late stages of pregnancy, altitudes should be limited to 2,500 metres (8,200 feet). 4  Women with pregnancy-related complications should avoid unnecessary high-altitude exposure.