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.
Generally, commercial air travel during pregnancy is considered safe for women who have healthy pregnancies. Still, if you're pregnant, it's best to check with your health care provider before you fly.Your health care provider might caution against air travel if your pregnancy is considered high risk or you're at risk of preterm labor.his is when you're likely to feel your best, and the risks of miscarriage and premature labor are the lowest. When you fly: 1  Check the airline's policy about air travel during pregnancy.