The fallopian tubes are delicate tubular structures which carry the ovum or sperm between the ovary and uterine cavity. The tubes are divided into named regions, most medially the cornu and interstial portion within the uterine wall, then the isthmus followed by the infundibu-lum, ampulla and finally fimbrial ends. They are lined by columnar epithelium and cilia which together with the peristaltic action of the surrounding smooth muscle propel the fertilized ovum towards the uterine cavity. The blood supply of the fallopian tubes arises from both the uterine and ovarian arteries through the mesosalpinx which is covered by peritoneum.
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The first trimester is very important for the mother and the baby. For most women it is common to find out about their pregnancy after they have missed their menstrual cycle. Since, not all women note their menstrual cycle and dates of intercourse, it may cause slight confusion about the exact date of conception. That is why most women find out that they are pregnant only after one month of pregnancy.