The mucosa of the cervical canal (endocervix) is composed of a single layer of mucin-secreting columnar epithelium, which lines both the surface and the underlying glandular crypts. Isolated neuroendocrine epithelial cells of argentaffin type or argyrophil type are admixed with the normal endocervical cells.
Air travel Pregnant travellers can normally travel safely by air. In the absence of medical or obstetrical complications, pregnant women can safely fly up to 36 weeks gestation. Most airlines restrict travel in late pregnancy or may require a written confirmation from a physician.
Traveling by Air During Pregnancy. Whether you are going by car, bus, or train, it is generally safe to travel while you are pregnant; however, there are some things to consider that could make your trip safer and more comfortable.1  It is essential to buckle-up every time you ride in a car.raveling by air is considered safe for women while they are pregnant; however, the following ideas might make your trip safer and more comfortable. 1  Most airlines allow pregnant women to travel through their eighth month.