نتایج جستجو برای: first trimester

تعداد نتایج: 1448121  

Journal: :Ultrasound in Obstetrics and Gynecology 2006

Journal: :Ultrasound in Obstetrics & Gynecology 2014

Journal: :BJOG: An International Journal of Obstetrics & Gynaecology 2015

2017

The incidence of multifetal pregnancies has increased dramatically over the past two decades, mainly because of the widespread use of ovulation induction agents and assisted reproduction techniques. These techniques have been a matter of concern since twin and higher order pregnancies have long been associated with an increased risk of maternal complications as well as a high prevalence of pren...

Journal: :Journal of the American Board of Family Medicine : JABFM 2009
Richard John Lyus Paul Gianutsos Marji Gold

Unintended pregnancy is common, and in the United States almost one-third [corrected] of all women will have at least one abortion during their lifetime. The majority of abortions are performed in the first trimester. Although advances have been made in the provision of medical abortion in the family medicine setting, procedural methods remain the cornerstone of abortion care. We present a step...

2014

Objective The introduction of first trimester nuchal translucency measurement has resulted in earlier identification of foetuses with exencephaly. Exencephaly is an uncommon congenital malformation in which the flat bones of calvaria are absent leaving the brain completely exposed or protrudes through the defect in the cranial vault. Anencephaly may ensue as a result of prolonged exposure of th...

Journal: :American journal of medical genetics. Part C, Seminars in medical genetics 2007
Kevin Spencer

This article reviews the performance of first trimester screening for chromosomal anomalies using various combinations of ultrasound and maternal serum biochemical modalities. Detection rates in excess of 90% can be routinely achieved for Trisomy 21, Trisomy 13, Trisomy 18 using a combination of fetal nuchal translucency (NT) thickness and maternal serum free ss-hCG and PAPP-A at 11 + 0 to 13 +...

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