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Interracial marriages were only legalized in the United States 50 years ago, which means that when a black man and white woman walk down the street holding hands in certain parts of the country, they are still going to get glared at.

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The bright white circle center-right is the head, which faces to the left.

Features include the forehead at 10 o'clock, the left ear toward the center at 7 o'clock and the right hand covering the eyes at .

In some countries, routine pregnancy sonographic scans are performed to detect developmental defects before birth.

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A gestational sac can be reliably seen on transvaginal ultrasound by 5 weeks gestational age (approximately 3 weeks after ovulation).The International Society of Ultrasound in Obstetrics and Gynecology (ISUOG) recommends that pregnant women have routine obstetric ultrasounds between 18 weeks and 22 weeks gestational age in order to confirm pregnancy timing, to measure the fetus so that growth abnormalities can be recognized quickly later in pregnancy, and to assess for congenital malformations and multiple gestations (i.e. Additionally, the ISUOG recommends that pregnant women have obstetric ultrasounds between 11 weeks and 13 weeks 6 days gestational age in countries with resources to perform them.Performing an ultrasound at this early stage of pregnancy can more accurately confirm the timing of the pregnancy and can also assess for multiple fetuses and major congenital abnormalities at an earlier stage.In normal state, each body tissue type, such as liver, spleen or kidney, has a unique echogenicity.Fortunately, gestational sac, yolk sac and embryo are surrounded by hyperechoic (brighter) body tissues.Some abnormalities detected by ultrasound can be addressed by medical treatment in utero or by perinatal care, though indications of other abnormalities can lead to a decision regarding abortion.