Variants of perinatal anatomy of the internal female genital organs

Abstract

While studying a seven-month old fetus of the female sex a rare variant of the topography of the internal genital organs and the blood vessels of the pelvis has been detected. The specific characteristics of the form and syntopy of the ovaries, uterine tubes have been described, the morphometric parameters of the common, external and internal iliac arteries have been presented. A research of the consistent patterns of the forming of the structure and topography of a fetus is of great importance for understanding the mechanisms of the form-building of organs. An investigation of the consistent patterns of the organization of the structure and topography of a fetus has an important value for understanding the mechanisms of the normal and pathological form building of organs [1-4]. Objective. Study peculiarities of variants of perinatal anatomy of the internal female genital organs, its topography and perinatal morphogenesis. Material and methods. The study was carried out on 50 human fetuses aged 4-10 months – measuring 250.0-500.0 mm of the parietococcygeal length (PCL). The material was fixed in a 7% formol solution during a fort night upon which the specific characteristics of the external structure of the internal female genital organs and their syntopy were studied, employing the method of thin sectioning under the control of a binocular magnifier and morphometry. Results.Uncommon variants of the external structure of the ovaries, as well as their forms, sizes, topography have been detected in fetuses, measuring 112.0; 117.0; 125.0 and 270.0 mm of the parietococygeal length (PCL). The right ovary in the fetus, measuring 112.0 mm PCL consists of three lobes: the uterine, two intermediate and tubal.The right ovary of an elongated form is located in the abdominal cavity obliquely. The uterine tube adjoins the lateral surface of the ovary, the rectum being located more medially.The left ovary of an elongated flattened form is located in the abdominal cavity slantwise. The right ovary is located in the abdominal cavity in a fetus of 117.0 mm PCL, horizontally obliquely, i.e. the longitudinal axis of the organ is directed from the level of the middle of the inguinal ligament to the promontory. The ovary is of an elongated oval from, they distinguish anteromedial, posterolateral and inferior surfaces, the superior rounded, anterior and posterior sharpened margins, the uterine and tubal rounded ends.The left ovary is located in the abdominal cavity horizontally the longitudinal axis of the organ passes in the frontal plane. The ovary is of an elongated bean – shaped form, the anterior and posterior surface, the superior convex and sharpened margin, the inferior one is somewhat rounded and concave, the uterine sharpened margin and the tubal rounded one are differentiated. Both the right and left ovaries in fetuses of 125.0 mm PCl are made up of two lobules: the uterine and tubal ones. The total length of the right ovary is 8.5 mm and its separate lobules –is 5 and 3 mm respectively. In a fetus – 270.0 mm of PCL the right ovary was composed of three lobes: the uterine, intermediate, tubal, whereas the left one of two lobules: the uterine and tubal. The right ovary is trihedral, approximated to an oval form located slantwise in the abdominal cavity. The anterior, posterior and lateral surfaces, the anterior, posterior and medial margins, the pointed uterine and tubal ends are differentiated in the ovary. The loops of the ileum are adjacent to the anterior surface of the ovary, whereas the ureter, the internal ileal artery and vein are adjacent to the tubal end.The left ovary is of an elongated, shape approximated to an oval form, it is located in the abdominal cavity horizontally. They differentiate the superior, inferior and anterior surfaces, the superior, inferior and posterior margins, the pointed uterine and the rounded tubal ends in the ovary. The anterior surface of the ovary is adjoined by the anterior loop of the sigmoid colon, while the ureter abuts on its posterior margin. The uterine end of the ovary is adjacent to the posterior surface of the tubal isthmus, whereas the tubal one- to the external ileal artery and vein. Conclusion: At the beginning of the fetal period of the development of the internal female genital organs a marked variability of the form and location of the ovaries, the uterine tubes, their mesenteries and ligaments is identified. The organization of their syntopy is in a correlation with the development of the rectum, urinary bladder and the pelvic structures.