نتایج جستجو برای: trimester
تعداد نتایج: 17576 فیلتر نتایج به سال:
OBJECTIVE The purpose of this study was to perform a cost-effectiveness analysis that compared the first- and second- trimester screening tools for Down syndrome. STUDY DESIGN A decision tree was designed that compared four possible screens for Down syndrome: (1) current second- trimester expanded maternal serum alpha-fetoprotein test (AFP), (2) first-trimester nuchal translucency screen, (3)...
Placenta accreta is a severe complication of pregnancy normally diagnosed during the second trimester. Early detection could reduce risk hemorrhage abortion or miscarriage; however, guidelines on first-trimester diagnosis are lacking. We describe case placenta first trimester with its sonographic and histological features.
OBJECTIVE Genetic sonography following first-trimester combined screening appears to increase substantially detection rates for Down syndrome but it relies on the unproved assumption of independence between these tests. In this study we aimed to investigate the relationship between first-trimester nuchal translucency (NT) and a series of second-trimester soft markers and structural defects in u...
BACKGROUND Gestational diabetes mellitus (GDM) is associated with adverse pregnancy outcomes such as preeclampsia and macrosomia. Women with polycystic ovary syndrome (PCOS) are at increased risk of developing GDM. Today, GDM is diagnosed by oral glucose tolerance test (OGTT), a rather cumbersome test for the women and health care system. The objectives of this study were to investigate whether...
CONTEXT The precise function of sleep in animals and human beings is still unknown, and any sort of physical, social or psychological variation may change the normal sleep-wake cycle. PURPOSE This research aims is to determine the sleep disorders (SD) for each of the three trimesters of the pregnancy comparing them to the pre-pregnancy state (PG). METHOD SD were investigated in three hundre...
Normal pregnancy is associated with intense alterations in the maternal cardiovascular system. The aim of the present study was, to assess the influence of normal pregnancy on maternal central aortic pressures, arterial stiffness, and arterial wave reflection using non-invasive PC based cardiovascular risk analysis system (Periscope). The current study was conducted on 137 women with, normotens...
OBJECTIVE To determine the main dietary patterns of pregnant women during each of the three trimesters of pregnancy and to examine associated nutrient intakes. DESIGN Participants completed a 3 d food diary during each trimester of pregnancy. Thirty-six food groups were created and dietary patterns were derived using k-means cluster analysis. SETTING National Maternity Hospital, Dublin, Ire...
BACKGROUND Increasing gestational age is associated with an increased risk of complications in studies assessing surgical termination of pregnancy (TOP). Medical TOP is widely used during the second trimester and little is known about the frequency of complications. This epidemiological study was undertaken to assess the frequency of adverse events following the second trimester medical TOP and...
OBJECTIVE This study aimed to survey the current clinical practice of first-trimester ultrasonography among members of the Korean Society of Ultrasound in Obstetrics and Gynecology (KSUOG) and to provide basic data for making practical recommendations about first-trimester ultrasonography scan in Korea. METHODS This survey was conducted using a self-administered anonymous questionnaire. The f...
BACKGROUND It is uncertain how best to screen pregnant women for the presence of fetal Down's syndrome: to perform first-trimester screening, to perform second-trimester screening, or to use strategies incorporating measurements in both trimesters. METHODS Women with singleton pregnancies underwent first-trimester combined screening (measurement of nuchal translucency, pregnancy-associated pl...
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