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 plane when pregnant. If you have a normal, healthy pregnancy, it can be safe to fly during most of it. However, discuss your trip plans with your doctor or midwife before booking your flight. In certain high-risk cases, your healthcare provider may advise you to stay close to home throughout your pregnancy.