Publications by authors named "Michal J Simchen"

Article Synopsis
  • Ovulation induction for IVF can lead to increased thrombosis risks in patients with antiphospholipid autoantibodies (aPLs) or antiphospholipid syndrome (APS), but the effectiveness of alternative natural cycles is unclear.
  • A study analyzed 121 IVF cycles in women with aPLs or APS, comparing stimulated cycles with anticoagulant treatment to natural and modified natural cycles.
  • Results showed that stimulated cycles had significantly lower cancellation rates and higher successful pregnancy outcomes, with no adverse thrombotic events reported, indicating that stimulation can be safely performed in these patients.
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The simultaneous occurrence of pregnancy and multiple myeloma (MM) is rare. The challenge of diagnosing MM during pregnancy is demonstrated in the case presented here. Despite the rarity of concurrent MM and pregnancy, this possibility should be considered in patients with signs and symptoms that may be attributed to MM so as not to delay the diagnosis and decision about pregnancy continuation and initiation of an appropriate and safe therapy to the mother and fetus.

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Objective: Preeclampsia during pregnancy is associated with an increased risk for various neonatal morbidities. We aimed to investigate the association between prematurity due to maternal preeclampsia and developmental outcomes.

Study Design: This retrospective matched case-control study included 39 preterm infants (<32 weeks gestation) born to preeclamptic mothers between 2012 and 2016, compared with 39 infants born to mothers without preeclampsia.

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Article Synopsis
  • The study investigates the link between antiphospholipid antibodies and the severity of early-onset preeclampsia, focusing on women who delivered before 34 weeks of gestation due to this condition.
  • A retrospective analysis of 101 pregnancies revealed that women with positive antiphospholipid antibodies experienced earlier hospitalization and delivery, lower birth weights, and more severe complications compared to those without.
  • Key findings include significantly lower platelet levels and higher serum creatinine in women with positive antiphospholipid antibodies, indicating more severe clinical outcomes in these patients.
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Objectives: An international diagnostic criterion for amniotic fluid embolism (AFE) diagnosis has recently been published. Data regarding subsequent pregnancies is scarce. We sought to implement recent diagnostic criteria and detail subsequent pregnancies in survivors.

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While the immediate effects of pregnancy on aortic dimension in patients with Marfan syndrome (MFS) have been evaluated, the late effects of subsequent pregnancies in these patients are less known. For this purpose, we evaluated 2 groups of women with MFS who were under specialized care in our institution. Group A included 23 women with MFS who experienced 55 pregnancies; group B included 12 nulliparous MFS patients.

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Research Question: To study gestational hypertensive disorders in oocyte donation pregnancies compared with other modes of conception at very advanced maternal age.

Design: A historical cohort study of all women aged 45-47 years who gave birth to singletons at a tertiary medical centre between March 2011 and May 2018, at 24 weeks' gestation or later. Pregnancy outcomes were compared between donor oocyte (IVF-OD), IVF using autologous oocytes (IVF-A) and naturally conceived pregnancies.

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Background: Rheumatic mitral stenosis (MS) is a relatively rare diagnosis in the developed countries and its treatment during pregnancy is challenging due to hemodynamic changes. With the demographic changes due to recent waves of immigration an increase in the prevalence of rheumatic heart disease is expected.

Objectives: To evaluate maternal and neonatal complications in patients with mitral stenosis.

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Background: Pregnancies in the fifth and sixth decades of life have been increasing, but current data are limited regarding the outcomes of twin compared with singleton pregnancies in this age group and to twin pregnancies at younger age.

Objective: To compare obstetrical and neonatal outcomes of IVF conceived pregnancies, in twin gestations of women who were ≥45 years old at delivery to singletons at similar age and twin gestations at the age of <35 years, and to assess if the complications are mainly influenced by the very advanced maternal age or by the multifetal pregnancy.

Study Design: A retrospective cohort study from a single tertiary medical center of women aged ≥45 at delivery between March 2011 and January 2018 and women aged <35 at delivery with twin pregnancies that conceived by IVF.

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The effect of additional treatments combined with conventional therapy on pregnancy outcomes was examined in high-risk primary antiphospholipid syndrome (PAPS) patients to identify the most effective treatment strategy. The study's inclusion criteria were (1) positivity to lupus anticoagulant alone or associated with anticardiolipin and/or anti-β2 glycoprotein I antibodies; (2) a history of severe maternal-foetal complications (Group I) or a history of one or more pregnancies refractory to conventional therapy leading to unexplained foetal deaths not associated with severe maternal-foetal complications (Group II). Two different additional treatments were considered: oral-low-dose steroids (10-20 mg prednisone daily) and/or 200 to 400 mg daily doses of hydroxychloroquine and parenteral-intravenous immunoglobulins at 2 g/kg per month and/or plasma exchange.

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Objective: The objective of this study is to investigate the clinical features of pregnancy in women with Takayasu's arteritis managed in a tertiary medical center and review the literature in order to establish the course and recommended follow up and treatment for these pregnancies.

Materials And Methods: Retrospective analysis of 20 pregnancies in 6 women with Takayasu's arteritis. Patients were recruited from the high risk pregnancy clinics at Sheba Medical Center, where follow up included strict control of blood pressure and treatment of obstetric and disease-related complications.

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Background: Extensive exposure of preterm infants to pain-related stress (PRS) at a time of physiological immaturity and rapid brain development may contribute to altered neurodevelopment.

Objective: To examine the relationship between early PRS and neurodevelopmental outcomes among low-risk very preterm infants at the age of one year corrected age (CA).

Methods: Participants included 107 infants born <32weeks gestational age (GA) and monitored prospectively at 12.

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The incompatibility causing fetal and neonatal alloimmune thrombocytopenia (FNAIT) results from a fetus inheriting a paternal human platelet antigen (HPA), which is different from the maternal HPA. We present a unique case of FNAIT in a pregnancy involving an oocyte recipient mother with Turner syndrome. This is the first report of FNAIT in which the suggested mechanism involves antibodies produced by a gestational mother against the incompatible HPA of the oocyte donor.

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Objective: To compare indications for delivery and neonatal morbidities between twins and singletons born between 34 and 35 weeks of gestation.

Study Design: A prospective observational study was performed in which all infants born between January and August 2008, at Sheba Medical Center at 34 0/7-35 6/7 weeks of gestational age were included. Indications for delivery, infants' morbidities and medical interventions were documented.

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Patients with Marfan syndrome (MS) face a high risk of aortic dissection during pregnancy. A dilated aortic root (>40 to 45 mm) is considered a relative contraindication for pregnancy. We investigated the risk for aortic dissection and pregnancy outcome in patients with MS.

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Objectives: To investigate factors that may affect breast milk feeding (BMF) practices among very preterm infants.

Materials And Methods: This retrospective study included infants born before 32 weeks gestational age (GA) and monitored up to 6 months corrected age (CA). Feeding method was assessed at day 14 of life, 36 weeks GA, 6 weeks after home discharge, and 6 months CA.

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Article Synopsis
  • The study investigates the prevalence of complete and partial post-traumatic stress disorder (PTSD) in women experiencing complicated pregnancies and aims to identify risk factors for postpartum PTSD.
  • Women in high-risk pregnancy clinics completed questionnaires on their demographics, psychological history, pregnancy complications, and childbirth fears, with follow-up assessments conducted after delivery.
  • The findings reveal a significant prevalence of postpartum PTSD (9.9%) and partial PTSD (11.9%), linked to prior trauma, difficult birth experiences, and emotional distress during pregnancy, leading to a predictive model for identifying at-risk women.
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Background: Fetal sex and maternal age are each known to affect outcomes of pregnancies. The objective of the present study was to investigate the influence of the combination of maternal age and fetal sex on pregnancy outcomes in term and post-term singleton pregnancies.

Material And Methods: This was a retrospective study on term singleton pregnancies delivered between 2004 and 2008 at the Chaim Sheba Medical Center.

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Objective: To ascertain the most common early morbidities in a cohort of infants born at 34-35 weeks gestation and to identify the risk factors associated with these morbidities.

Methods: Retrospective analysis of data collected prospectively for all 235 infants born at 34-35 weeks of gestation during an eight-month period at a single tertiary medical center. Study group infants (SG) were compared with 470 term infants (TI), matched both for gender and for mode of delivery.

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Aims: Peripartum cardiomyopathy (PPCM) is an infrequent form of cardiomyopathy causing significant maternal morbidity and mortality. We aimed to evaluate the risk factors, characteristics and prognosis of PPCM during the index and subsequent pregnancies.

Methods: A retrospective cohort of 36 women with PPCM in a tertiary medical center was analyzed and compared with 10,370 women who gave birth during a single calendar year at the same institution.

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Background: Homozygous carriers of factor V Leiden (FVL) have an up to 80-fold increased risk of venous thrombosis, but the risk of obstetric complications in FVL homozygosity is unclear.

Objectives: To compare obstetric and thromboembolic complications among factor V Leiden (FVL) homozygous and heterozygous carriers treated with prophylactic dose anticoagulation during pregnancy.

Methods: In this retrospective case-control study we performed a chart review for the years 2004-2010 of homozygous and heterozygous FVL carriers who were treated with low molecular weight heparin (LMWH) at a dose of 0.

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Objective: To determine the admission to delivery interval and the rate of immediate delivery in twin versus singleton gestation complicated by spontaneous preterm labor (SPTL).

Methods: A retrospective cohort study of pregnant women presenting with advanced cervical dilatation of 3-5 cm and frequent uterine contractions at 24-34 weeks of gestation was performed. The rate of progression to delivery within 12 h and 24 h, as well as rates of prolonged latency, were compared between twins and singletons gestations.

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Objective: To evaluate whether early term labor induction for suspected intrauterine growth restriction (weeks 37-39) improves neonatal outcome for small-for-gestational-age (SGA) neonates.

Study Design: Delivery room data for 2004-2008 from a single tertiary medical center were linked to neonatal discharge data from the same institution. Data were limited to all singleton, liveborn SGA neonates born at 37-42 weeks of gestation and their mothers.

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Objective: Sex differences in long and short-term outcomes for infants are observed. This has also been shown for several neonatal complications in preterm neonates. We aimed to evaluate whether sex impacts neonatal outcome among term neonates.

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Aim: To longitudinally assess the neurodevelopmental outcomes of late preterm infants (LPI) through the first year of life and to investigate for perinatal conditions that may affect developmental outcomes.

Methods: The study population comprised of 124 LPI, born in a single Israeli inborn center over an eight months period. Thirty-three term infants (TI) were recruited for comparison.

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