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.
Motorcycle travel is not recommended during pregnancy. What if I am traveling by bus or train? You might have less opportunity to walk every couple of hours when you travel by bus. Take advantage of any stops the bus makes to get some exercise. When you are traveling by train, get up and walk every hour or two. Remember that there are fewer bathrooms on a bus than on a train. The motion of a train ride will not cause any problems with the pregnancy, such as starting labor. Are there special concerns for traveling by air? Flying is usually a safe way to travel. Most domestic airlines will allow a pregnant woman to fly up to the 36th week of pregnancy if there are no problems with the pregnancy. Each airline has policies regarding pregnancy and flying. Check with your airline when your reserve your tickets to see if you need to complete any medical forms.