[Characteristics of the microvascular bed of the uterine tubes in women].

A histological investigation of the fallopian tube vascular bed has been performed in women at various phases of the menstrual cycle (28 observation) and at early uterine pregnancy (6 observations). Topographic isolated mechanisms of blood shunting and deposition participating in cyclic changes in the uterine tube functional activity have been revealed. The blood shunting is performed by the occlusive arterioles and arteriolo-venular semi-shunts situating, mainly, in the tubular isthmus. The blood deposition occurs in the infundibular-ampular portion, at the expense of the postcapillary sinus system, convoluted and occlusive venules. The role of hemomicrocirculatory pathways and the lymphatic sinuses of fimbrias to perform physiological "mechanism of the ova acceptance" is also noted.