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Multiple pregnancies account for 2-3% of live births and involve the presence of more than one fetus in the uterus, presenting unique challenges for both maternal and fetal health. Chorionicity refers to the number of placentas, while amnionicity describes the number of amniotic sacs.

Twin Anemia Polycythemia Sequence (TAPS) is a relatively rare but potentially severe fetal condition that occurs in monochorionic twin pregnancies.

This autumn, ISUOG (International Society of Ultrasound in Obstetrics and Gynecology) will host a series of webinars in various languages aimed at engaging healthcare professionals involved in ultrasound who speak Portuguese, French, and/or Spanish.

The April issue of Ultrasound in Obstetrics & Gynecology includes a systematic review on the diagnostic performance of prenatal ultrasound in coarctation of the aorta, a nationwide cohort study on the outcome of multifetal reduction in quadruplet pregnancy, a study validating the IETA-1 model for intracavitary uterine pathology in women without abnormal uterine bleeding and a summary of the findings of a systematic review on cervical cerclage in twin pregnancy.

The February issue of Ultrasound in Obstetrics & Gynecology includes a systematic review evaluating adverse perinatal outcome in dichorionic twin pregnancy complicated by selective fetal growth restriction, a study deriving chorionicity-specific reference ranges for fetal growth in twin pregnancy, an analysis of emergency Cesarean delivery in placenta previa and placenta accreta spectrum and an evaluation of the diagnostic test accuracy of a standardized transvaginal examination for deep endometriosis of the uterosacral ligaments and torus uterinus.

The January issue of Ultrasound in Obstetrics & Gynecology includes a systematic review exploring the value of whole-genome sequencing in the diagnosis of congenital anomalies, a randomized controlled trial investigating the utility of visual biofeedback during the second stage of labor in facilitating maternal pushing, a study on the diagnosis of superficial endometriosis using transvaginal ultrasound, and a study demonstrating the potential of deep learning in improving fetal heart screening. This issue also features the new ISUOG Practice Guidelines on the performance of third-trimester obstetric ultrasound scan.

The November issue of Ultrasound in Obstetrics & Gynecology includes a systematic review evaluating the incidence of urological complications in women undergoing Cesarean section for placenta accreta spectrum disorders, a study proposing a new marker to facilitate identification of fetuses with agenesis of the corpus callosum, and two studies providing evidence of an association between epidural analgesia and increased risk of emergency delivery for fetal compromise. The potentially significant impact of the findings of the latter two studies are countered in an accompanying Editorial by Cavoretto and colleagues and in a series of Correspondence articles.

The October issue of Ultrasound in Obstetrics & Gynecology includes a systematic review evaluating the incidence and predictive factors of obstetric anal sphincter injury in primiparous women, a study providing preliminary evidence supporting the feasibility and efficacy of prenatal open spina bifida repair in twin pregnancy and two studies assessing the utility of glycosylated fibronectin as a new biomarker for pre-eclampsia screening in mixed and Asian populations. The issue also features a study demonstrating the efficacy and safety of in-utero treatment of sustained fetal supraventricular arrhythmia in late preterm and term fetuses and an accompanying Editorial on the topic.

Read the newly updated ISUOG Practice Guidelines on the performance of fetal cardiac screening.

The September issue of Ultrasound in Obstetrics & Gynecology includes a systematic review examining the impact of concurrent selective fetal growth restriction on the outcome of pregnancies with twin–twin transfusion syndrome following laser surgery, a study investigating the prevalence, pathophysiology and impact of a midline cystic structure recently reported in some fetuses with open spina bifida, a prospective study aiming to determine the best strategy for prediction of hypertensive disorders at 36 weeks’ gestation, and a large study of 25,329 patients evaluating the effect of reproductive history on the outcome of in-vitro fertilization.

Don't miss your chance to get reduced registration fees for our flagship World Congress event in Seoul this October. There are only two weeks left to register before the early bird deadline on August 16th.

The August issue of Ultrasound in Obstetrics & Gynecology includes a systematic review of studies developing reference charts for fetal biometry of the corpus callosum, a large study investigating the implication of third-trimester screening accuracy for small-for-gestational age and additive value of third-trimester growth-trajectory indicators in predicting severe adverse perinatal outcome in low-risk pregnancies, a study on diagnostic sonographic features and management of intramural pregnancy, and a study proposing markers for first-trimester prediction of ventriculomegaly.

The May issue of Ultrasound in Obstetrics & Gynecology includes a systematic review investigating the outcome following early vs late selective termination in dichorionic twin pregnancies, a prospective study aiming to estimate the prevalence of endometriosis using transvaginal ultrasound, a study proposing new criteria for predicting outcome in cases of tricuspid valve dysplasia and Ebstein’s anomaly using fetal tricuspid regurgitation waveform analysis, and a large prospective midgestation study examining cardiac function and morphology of fetuses conceived via in-vitro fertilization. The May issue also features a randomized controlled trial evaluating the impact of predictive information regarding the likely outcome of pregnancy on psychological wellbeing of women with a pregnancy of uncertain viability during the waiting period to final diagnosis.

The April issue of Ultrasound in Obstetrics & Gynecology includes a systematic review evaluating the safety and effectiveness of prenatal valacyclovir therapy in prevention and treatment of congenital cytomegalovirus infection, a large population-based study investigating the link between birth-weight centile and school performance, a prospective longitudinal study providing reference ranges for uterine artery pulsatility index across gestation and a Delphi consensus study focusing on ultrasound in the prenatal evaluation and management of patients at high risk of placenta accreta spectrum at delivery.

Read the newly updated ISUOG Practice Guidelines on the performance of fetal MRI.

ISUOG's Visual Encyclopedia (VISUOG) chapter on Doppler assessment in twin pregnancies is open access this February. Enjoy a 10% discount on ISUOG membership and view VISUOG for an entire year

The January issue of Ultrasound in Obstetrics & Gynecology includes a systematic review and meta-analysis investigating perinatal outcome following blastocyst- vs cleavage-stage embryo transfer, two multicenter studies on cytomegalovirus infection in pregnancy, and a follow-up study of a multicenter trial, which is the first to report on the long-term mortality and morbidity of cases receiving transplacental treatment for fetal supraventricular tachyarrhythmia. This issue also includes the newly updated ISUOG Practice Guideline on the performance of first-trimester ultrasound scan.

The October issue of Ultrasound in Obstetrics & Gynecology includes a systematic review and meta-analysis providing the most up-to-date evidence on the performance of the sliding sign for detecting pouch of Douglas obliteration and bowel involvement in patients with endometriosis, the first study to investigate the diagnostic yield of whole-genome sequencing for non-immune hydrops fetalis, a study investigating the optimal method for selective fetal reduction in complicated monochorionic pregnancies, and a study evaluating the diagnostic test accuracy of magnetic resonance imaging and pelvic floor ultrasound for diagnosis of levator ani muscle avulsion. Additionally, the October issue features the latest research on the impact of pre-eclampsia on the maternal brain, including its detrimental effects on functional organization of the brain and integrity of the blood–brain barrier, detectable years after the complicated pregnancy.

The August issue of Ultrasound in Obstetrics & Gynecology includes a multicenter study developing and validating radiomics models to predict high-risk endometrial cancer, a prospective study providing insight into ultrasound features observed in asymptomatic women with endometrial pathology, and a systematic review and meta-analysis investigating the true incidence and outcomes of brain abnormality in surviving children following laser surgery for twin-to-twin transfusion syndrome. The August issue also features two novel studies providing complementary evidence supporting the role of uteroplacental dysfunction in preterm birth and discussing the potential of placental biomarkers in the prediction of preterm delivery in the first trimester. This month also sees the release of an Early View version of ISUOG Practice Guidelines on the role of ultrasound in the prediction of spontaneous preterm birth.

Read the new ISUOG Practice Guidelines on the role of ultrasound in the prediction of spontaneous preterm birth.