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 Sea During Pregnancy. Traveling by sea is generally safe for women while they are pregnant; the motion of the boat may accentuate any morning sickness or make you feel nauseous all over again. There are a few considerations to make your trip safer and more comfortable: