We evaluated the possible role of increased adenosine in the regulation of uteroplacental circulation during nonpreeclamptic twin gestations. We performed uterine artery Doppler velocimetry and maternal arterial blood sampling for measurement of plasma adenosine levels in 16 women with singleton gestation and 14 women with dichorionic twin gestation without preeclampsia at 11-12, 25-26 and 34-3...

Fewer than 100 cases of uterine arteriovenous malformation are reported which can cause lifethreatening torrential hemorrhage. Prompt diagnosis and treatment are necessary with keeping differential diagnosis of retained products of conception and gestational trophoblastic disease in mind in cases of postpregnancy or post-abortal arteriovenous malformation. We report a case of 27 year old young ...

OBJECTIVES To compare the feasibility of two transabdominal approaches for performing first-trimester uterine artery (UtA) Doppler and to evaluate the correlation with pulsatility index (PI) in the second trimester. METHODS This was a prospective longitudinal Doppler study of the uterine arteries at 11-13 and 21-22 weeks' gestation. Transabdominal ultrasound and color Doppler were used to mea...

Fifty-three high-risk pregnancies were followed up serially with Doppler velocimetry of the umbilical artery and uterine vessels from early on to investigate whether abnormalities in Doppler waveforms can predict the outcome of pregnancy accurately before other clinical signs develop. Results of Doppler velocimetry were withheld from the clinicians managing the patients. When the absence of end...

PURPOSE Plasma levels of renin, angiotensin II and aldosterone are increased during normal pregnancy. However, these values in preeclampsia are decreased to nearly that of a nonpregnant subject, and vascular sensitivity to angiotensin II is increased. In preeclampsia, aldosterone is decreased less than rennin. Therefore current studies were undertaken to determine the relationship between aldos...

Background: It is assumed in polycystic ovary syndrome (PCOS) that follicular development, maturation, ovulation and implantation are impaired due to hormonal imbalance and vascular impairment of the ovarian and uterine vasculatures. The mechanism of action of laparoscopic ovarian drilling (LOD) is largely unexplained. To date, only limited studies have been conducted utilizing 3D ultrasonograp...

OBJECTIVE To investigate whether maternal anxiety in the third trimester is associated with an increased uterine artery resistance index. DESIGN Cohort based study. SUBJECTS 100 pregnant women, with a mean gestation of 32 weeks. OUTCOME MEASURES Self rating Spielberger questionnaire for state anxiety and trait anxiety, and uterine blood flow waveform patterns as assessed by colour Doppler...

PURPOSE To investigate whether, in the second trimester of pregnancy, placental T2 relaxation time (determined using magnetic resonance imaging (MRI)) is related to impedance to flow in the uterine arteries. METHODS In 40 singleton pregnancies at 24-29 weeks' gestation, uterine artery pulsatility index (PI) was measured by Doppler ultrasound and T2 relaxation time was measured by echo planar ...