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Background/aim Ovarian hyperstimulation syndrome (OHSS) is a complication of ovarian stimulation with increased vascular endothelial growth factor (VEGF) and vascular permeability in the ovarian tissue. Transient receptor potential melastatin 2 (TRPM2) is known to be associated with angiogenesis and vascular permeability. In this experimental study, we aimed to investigate the activity of TRPM2 in the development of OHSS. Materials and methods Fourteen immature female rats were divided into two groups. Group 1 was the control group, and Group 2 was the OHSS group that was exposed to 10 IU of subcutaneous application of FSH for four days and 30 IU of human chorionic gonadotropin (hCG) on the 5th day. At the end of the experiment, the ovaries were removed. The right ovarian tissues were stored in 10% formol for histopathological and immunohistochemical examination. The left ovarian tissues were stored at –80 °C for biochemical examinations. VEGF, tumor necrosis factor-alpha (TNF‐α) and malondialdehyde (MDA) levels were measured in the ovarian tissue. Congestion, edema, apoptosis and TRPM2 immunoreactivity were evaluated. Results There was a significant increase in ovarian weight in the OHSS group compared to the control group. There was a significant increase in congestion, edema, apoptosis and TRPM2 immunoreactivity in the OHSS group. A significant increase in tissue levels of VEGF, TNF‐α and MDA was also found in the OHSS group compared to the control group. Conclusion As a result of our experiment, it was found that increased TRPM2 immunoreactivity on hyperstimulated rat ovary may be the reason or result of edema and congestion. Further studies are needed to discuss our results.

Objective To investigate the incidence and concomitant findings of persistent right umbilical vein (PRUV). Methods The study was conducted by retrospective review of the data of 1856 patients who admitted to the Clinic of Obstetrics and Gynecology of Fırat University between December 2018 and December 2019 for the gestational examination between 14 and 28 weeks of gestation. The obstetric characteristics of the patients such as age, number of pregnancy, abortion, parity and body mass index were recorded. The diagnosis of PRUV was established in the conditions where portal vein reaches to stomach abnormally (roughly, course towards stomach instead of parallel course), fetal gall bladder locates in the medial of umbilical vein or umbilical vein connects to right portal vein abnormally instead of left portal vein. In the cases diagnosed with PRUV, the isolated persistent right umbilical vein or its association with other anomalies was recorded. Ultrasonography findings (minor markers) were also recorded in these cases. Results During the study period, 1856 pregnant women were evaluated for gestational examination. Five cases were established with the diagnosis of PRUV. Accordingly, PRUV prevalence was 0.27%. The PRUV incidence in the study population was 1/370 in the study population. No chromosomal anomaly was found in PRUV cases, but one case had echogenic intracardiac focus, one case had echogenic intestine, and one case had short nasal bone. When organ systems were evaluated, renal cyst was found in one case. No additional finding was found in one case. Conclusion PRUV is the most common form among fetal venous system anomalies. If detected, fetal examination is required in terms of the anomalies that may accompany. Chromosome analysis is not necessary if it is isolated, and it should be evaluated as a variant of normal anatomy.