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The sex of the fetus may be discerned by ultrasound as early as 11 weeks' gestation. The accuracy is relatively imprecise when attempted early. [15] [16] [17] After 13 weeks' gestation, a high accuracy of between 99% and 100% is possible if the fetus does not display intersex external characteristics. [18]
Stages in prenatal development, with weeks and months numbered from last menstruation. In humans, the usual definition of preterm birth is birth before a gestational age of 37 complete weeks. [94] In the normal human fetus, several organ systems mature between 34 and 37 weeks, and the fetus reaches adequate maturity by the end of this period.
Ultrasound is an excellent method for the study of the penis, such as indicated in trauma, priapism, erectile dysfunction or suspected Peyronie's disease. [ 1 ] Ultrasound is an imaging modality that, in addition to being well tolerated and widely available, is considered an excellent method for the evaluation of many penile diseases.
Photos of what pregnancy tissue from early abortions at 5 to 9 weeks looks like have gone viral. ... This is the motion that is seen on ultrasound and that people refer to as a ‘heartbeat ...
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UOTW_54_-_Ultrasound_of_the_Week_3.webm (WebM audio/video file, VP8, length 8.2 s, 792 × 470 pixels, 1.01 Mbps overall, file size: 1,015 KB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
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