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&lt;br /&gt; Educational gallery of&lt;br /&gt; obstetrical ultrasound&lt;br /&gt; Table of contents&lt;br /&gt; &lt;br /&gt; &lt;br /&gt; 1st trimester examination&lt;br /&gt; 1st trimester imaging..............................................................................4&lt;br /&gt; Sonographic signs by weeks of gestation ................................14&lt;br /&gt; 2nd trimester examination&lt;br /&gt; Fetal presentation and environment ..................................... 15&lt;br /&gt; Fetal head and intracranial anatomy ...................................... 19&lt;br /&gt; Fetal biometr y...................................................................................... 29&lt;br /&gt; Fetal heart and thorax....................................................................34&lt;br /&gt; Fetal abdomen and spine...............<a title="OB Atlas page 1" href="http://viewer.zmags.com/publication/c0bb8afd?page=1">Educational gallery ofobstetrical ultrasound</a> Educational gallery ofobstetrical ultrasound<a title="OB Atlas page 2" href="http://viewer.zmags.com/publication/c0bb8afd?page=2">Table of contents1st trimester examination </a> Table of contents1st trimester examination <a title="OB Atlas page 3" href="http://viewer.zmags.com/publication/c0bb8afd?page=3">IntroductionWelcome to the Philips educational </a> IntroductionWelcome to the Philips educational <a title="OB Atlas page 4" href="http://viewer.zmags.com/publication/c0bb8afd?page=4">1st trimester examination1st trimester imaging</a> 1st trimester examination1st trimester imaging<a title="OB Atlas page 5" href="http://viewer.zmags.com/publication/c0bb8afd?page=5">Amnion and gestational sac10-week gestation</a> Amnion and gestational sac10-week gestation<a title="OB Atlas page 6" href="http://viewer.zmags.com/publication/c0bb8afd?page=6">1st trimester examinationYolk sac</a> 1st trimester examinationYolk sac<a title="OB Atlas page 7" href="http://viewer.zmags.com/publication/c0bb8afd?page=7">Fetus9.5-week gestation7</a> Fetus9.5-week gestation7<a title="OB Atlas page 8" href="http://viewer.zmags.com/publication/c0bb8afd?page=8">1st trimester examinationMultiple </a> 1st trimester examinationMultiple <a title="OB Atlas page 9" href="http://viewer.zmags.com/publication/c0bb8afd?page=9">Fetal heart rate tracing using M-mode8-week gest</a> Fetal heart rate tracing using M-mode8-week gest<a title="OB Atlas page 10" href="http://viewer.zmags.com/publication/c0bb8afd?page=10">1st trimester examinationFetal cr</a> 1st trimester examinationFetal cr<a title="OB Atlas page 11" href="http://viewer.zmags.com/publication/c0bb8afd?page=11">Nuchal translucencyFetal profile at 12.6-weeks g</a> Nuchal translucencyFetal profile at 12.6-weeks g<a title="OB Atlas page 12" href="http://viewer.zmags.com/publication/c0bb8afd?page=12">1st trimester examinationIntracran</a> 1st trimester examinationIntracran<a title="OB Atlas page 13" href="http://viewer.zmags.com/publication/c0bb8afd?page=13">Umbilical cord insertion10.6-week gestation</a> Umbilical cord insertion10.6-week gestation<a title="OB Atlas page 14" href="http://viewer.zmags.com/publication/c0bb8afd?page=14">1st trimester examinationSonographic signs by </a> 1st trimester examinationSonographic signs by <a title="OB Atlas page 15" href="http://viewer.zmags.com/publication/c0bb8afd?page=15">2nd trimester examinationFetal presentation an</a> 2nd trimester examinationFetal presentation an<a title="OB Atlas page 16" href="http://viewer.zmags.com/publication/c0bb8afd?page=16">Lower uterine segmentCephalic presentation1</a> Lower uterine segmentCephalic presentation1<a title="OB Atlas page 17" href="http://viewer.zmags.com/publication/c0bb8afd?page=17">Uterus and placentaPlacenta interface17</a> Uterus and placentaPlacenta interface17<a title="OB Atlas page 18" href="http://viewer.zmags.com/publication/c0bb8afd?page=18">2nd trimester examinationUmbili</a> 2nd trimester examinationUmbili<a title="OB Atlas page 19" href="http://viewer.zmags.com/publication/c0bb8afd?page=19">2nd trimester examinationFetal head and intrac</a> 2nd trimester examinationFetal head and intrac<a title="OB Atlas page 20" href="http://viewer.zmags.com/publication/c0bb8afd?page=20">Lateral ventricleFetal cranium at the levelof t</a> Lateral ventricleFetal cranium at the levelof t<a title="OB Atlas page 21" href="http://viewer.zmags.com/publication/c0bb8afd?page=21">Cerebellum, posterior fossaand nuchal fold measu</a> Cerebellum, posterior fossaand nuchal fold measu<a title="OB Atlas page 22" href="http://viewer.zmags.com/publication/c0bb8afd?page=22">2nd trimester examinationAxial vi</a> 2nd trimester examinationAxial vi<a title="OB Atlas page 23" href="http://viewer.zmags.com/publication/c0bb8afd?page=23">Choroid plexus16.8-week gestation23</a> Choroid plexus16.8-week gestation23<a title="OB Atlas page 24" href="http://viewer.zmags.com/publication/c0bb8afd?page=24">2nd trimester examinationCavum sep</a> 2nd trimester examinationCavum sep<a title="OB Atlas page 25" href="http://viewer.zmags.com/publication/c0bb8afd?page=25">Corpus callosum19-week gestation25</a> Corpus callosum19-week gestation25<a title="OB Atlas page 26" href="http://viewer.zmags.com/publication/c0bb8afd?page=26">2nd trimester examinationOrbitsA</a> 2nd trimester examinationOrbitsA<a title="OB Atlas page 27" href="http://viewer.zmags.com/publication/c0bb8afd?page=27">Nasal bone15-week gestation27</a> Nasal bone15-week gestation27<a title="OB Atlas page 28" href="http://viewer.zmags.com/publication/c0bb8afd?page=28">2nd trimester examinationNose a</a> 2nd trimester examinationNose a<a title="OB Atlas page 29" href="http://viewer.zmags.com/publication/c0bb8afd?page=29">2nd trimester examinationFetal biometry&bull; Bipa</a> 2nd trimester examinationFetal biometry&bull; Bipa<a title="OB Atlas page 30" href="http://viewer.zmags.com/publication/c0bb8afd?page=30">2nd trimester examinationBiparieta</a> 2nd trimester examinationBiparieta<a title="OB Atlas page 31" href="http://viewer.zmags.com/publication/c0bb8afd?page=31">Head circumference17-week gestation31</a> Head circumference17-week gestation31<a title="OB Atlas page 32" href="http://viewer.zmags.com/publication/c0bb8afd?page=32">2nd trimester examinationAbdominal</a> 2nd trimester examinationAbdominal<a title="OB Atlas page 33" href="http://viewer.zmags.com/publication/c0bb8afd?page=33">Femur length17-week gestation33</a> Femur length17-week gestation33<a title="OB Atlas page 34" href="http://viewer.zmags.com/publication/c0bb8afd?page=34">2nd trimester examinationFetal heart and thora</a> 2nd trimester examinationFetal heart and thora<a title="OB Atlas page 35" href="http://viewer.zmags.com/publication/c0bb8afd?page=35">4 chamber view of the fetal heart19-week gestati</a> 4 chamber view of the fetal heart19-week gestati<a title="OB Atlas page 36" href="http://viewer.zmags.com/publication/c0bb8afd?page=36">2nd trimester examination4 chamber</a> 2nd trimester examination4 chamber<a title="OB Atlas page 37" href="http://viewer.zmags.com/publication/c0bb8afd?page=37">4-chamber view23.5-week gestation37</a> 4-chamber view23.5-week gestation37<a title="OB Atlas page 38" href="http://viewer.zmags.com/publication/c0bb8afd?page=38">2nd trimester examinationLeft outf</a> 2nd trimester examinationLeft outf<a title="OB Atlas page 39" href="http://viewer.zmags.com/publication/c0bb8afd?page=39">Right outflow tract23.5-week gestation3</a> Right outflow tract23.5-week gestation3<a title="OB Atlas page 40" href="http://viewer.zmags.com/publication/c0bb8afd?page=40">2nd trimester examinationFetal hea</a> 2nd trimester examinationFetal hea<a title="OB Atlas page 41" href="http://viewer.zmags.com/publication/c0bb8afd?page=41">Fetal thoraxSagittal sweep of the chest and uppe</a> Fetal thoraxSagittal sweep of the chest and uppe<a title="OB Atlas page 42" href="http://viewer.zmags.com/publication/c0bb8afd?page=42">2nd trimester examinationFetal abdomen and spi</a> 2nd trimester examinationFetal abdomen and spi<a title="OB Atlas page 43" href="http://viewer.zmags.com/publication/c0bb8afd?page=43">Stomach and bladder23-week gestation43</a> Stomach and bladder23-week gestation43<a title="OB Atlas page 44" href="http://viewer.zmags.com/publication/c0bb8afd?page=44">2nd trimester examinationFetal kid</a> 2nd trimester examinationFetal kid<a title="OB Atlas page 45" href="http://viewer.zmags.com/publication/c0bb8afd?page=45">Fetal kidneysA coronal view of the fetal abdomen</a> Fetal kidneysA coronal view of the fetal abdomen<a title="OB Atlas page 46" href="http://viewer.zmags.com/publication/c0bb8afd?page=46">2nd trimester examinationCord inse</a> 2nd trimester examinationCord inse<a title="OB Atlas page 47" href="http://viewer.zmags.com/publication/c0bb8afd?page=47">Cervical and thoracic spine24-week gestation</a> Cervical and thoracic spine24-week gestation<a title="OB Atlas page 48" href="http://viewer.zmags.com/publication/c0bb8afd?page=48">2nd trimester examinationThoraco-</a> 2nd trimester examinationThoraco-<a title="OB Atlas page 49" href="http://viewer.zmags.com/publication/c0bb8afd?page=49">Cervical, thoracic, lumbar, and sacral spine19-w</a> Cervical, thoracic, lumbar, and sacral spine19-w<a title="OB Atlas page 50" href="http://viewer.zmags.com/publication/c0bb8afd?page=50">2nd trimester examinationThoracic </a> 2nd trimester examinationThoracic <a title="OB Atlas page 51" href="http://viewer.zmags.com/publication/c0bb8afd?page=51">2nd trimester examinationFetal extremities&bull; L</a> 2nd trimester examinationFetal extremities&bull; L<a title="OB Atlas page 52" href="http://viewer.zmags.com/publication/c0bb8afd?page=52">2nd trimester examinationLower ext</a> 2nd trimester examinationLower ext<a title="OB Atlas page 53" href="http://viewer.zmags.com/publication/c0bb8afd?page=53">Lower extremities and feetPlantar surface of the</a> Lower extremities and feetPlantar surface of the<a title="OB Atlas page 54" href="http://viewer.zmags.com/publication/c0bb8afd?page=54">2nd trimester examinationUpper </a> 2nd trimester examinationUpper <a title="OB Atlas page 55" href="http://viewer.zmags.com/publication/c0bb8afd?page=55">Upper extremities and hands24-week gestation</a> Upper extremities and hands24-week gestation<a title="OB Atlas page 56" href="http://viewer.zmags.com/publication/c0bb8afd?page=56">3rd trimester examinationFetal biometry&bull; Bipa</a> 3rd trimester examinationFetal biometry&bull; Bipa<a title="OB Atlas page 57" href="http://viewer.zmags.com/publication/c0bb8afd?page=57">BiometryBiparietal diameter (BPD), and head circ</a> BiometryBiparietal diameter (BPD), and head circ<a title="OB Atlas page 58" href="http://viewer.zmags.com/publication/c0bb8afd?page=58">3rd trimester examinationBiometry</a> 3rd trimester examinationBiometry<a title="OB Atlas page 59" href="http://viewer.zmags.com/publication/c0bb8afd?page=59">BiometryFemur length59</a> BiometryFemur length59<a title="OB Atlas page 60" href="http://viewer.zmags.com/publication/c0bb8afd?page=60">3rd trimester examinationFetal intracranial an</a> 3rd trimester examinationFetal intracranial an<a title="OB Atlas page 61" href="http://viewer.zmags.com/publication/c0bb8afd?page=61">Lateral ventricle33-week gestation61</a> Lateral ventricle33-week gestation61<a title="OB Atlas page 62" href="http://viewer.zmags.com/publication/c0bb8afd?page=62">3rd trimester examinationPoster</a> 3rd trimester examinationPoster<a title="OB Atlas page 63" href="http://viewer.zmags.com/publication/c0bb8afd?page=63">Fetal heart rate tracingFetal heart rate tracing</a> Fetal heart rate tracingFetal heart rate tracing<a title="OB Atlas page 64" href="http://viewer.zmags.com/publication/c0bb8afd?page=64">3rd trimester examinationUmbilical</a> 3rd trimester examinationUmbilical<a title="OB Atlas page 65" href="http://viewer.zmags.com/publication/c0bb8afd?page=65">Fetal breathing motion34-week gestation65</a> Fetal breathing motion34-week gestation65<a title="OB Atlas page 66" href="http://viewer.zmags.com/publication/c0bb8afd?page=66">3rd trimester examinationTypical biophysical p</a> 3rd trimester examinationTypical biophysical p<a title="OB Atlas page 67" href="http://viewer.zmags.com/publication/c0bb8afd?page=67">Method Two: Prominent in EuropeEach variable inc</a> Method Two: Prominent in EuropeEach variable inc<a title="OB Atlas page 68" href="http://viewer.zmags.com/publication/c0bb8afd?page=68">ReferencesReferences &ndash; 1st trimester examinat</a> ReferencesReferences &ndash; 1st trimester examinat<a title="OB Atlas page 69" href="http://viewer.zmags.com/publication/c0bb8afd?page=69">Hagen-Ansert S. Textbook of diagnostic ultrasonog</a> Hagen-Ansert S. Textbook of diagnostic ultrasonog<a title="OB Atlas page 70" href="http://viewer.zmags.com/publication/c0bb8afd?page=70">Clinical sourcesClinical sourcesSameer Gopal</a> Clinical sourcesClinical sourcesSameer Gopal<a title="OB Atlas page 71" href="http://viewer.zmags.com/publication/c0bb8afd?page=71">71</a> 71<a title="OB Atlas page 72" href="http://viewer.zmags.com/publication/c0bb8afd?page=72">Philips Healthcare is part ofRoyal Philips Elect</a> Philips Healthcare is part ofRoyal Philips Elect