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From the 1660s to the 1960s, forty-one territories, colonies, or states enacted laws—anti-miscegenation statutes—barring sex or marriage between blacks and whites, and many states ultimately made marriage across the color line a felony.
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Whether or not you receive an ultrasound during your first trimester of pregnancy depends on a number of factors, including your risk for complications.

Common reasons for receiving an ultrasound examination in the first trimester are to confirm Most ultrasounds obtain an image by sliding a transducer over the abdomen.

The baby will be measured, and the anatomy examined in detail.

It is recommended that all pregnant women have a scan in the first trimester at around 12 weeks of pregnancy to confirm their dates.

However, in the early pregnancy, the developing embryo is very small (at 6 weeks gestation, the baby is only 5-9mm long) and a transvaginal ultrasound may be required to get a better image of the baby.

Transvaginal ultrasound is safe and commonly performed during all stages of pregnancy, including the first trimester. Transabdominal ultrasound involves scanning through your lower abdomen.

Scans are usually performed by a doctors, midwives or radiographers who are specially trained in ultrasound, and are known as sonographers.An ultrasound scan involves transmitting high frequency sound waves through the uterus.These bounce off the baby and the returning echoes (sound waves) are translated by a computer into an image on a screen that reveals the baby's position and movements.Transvaginal ultrasound usually produces better and clearer images of the female pelvic organs including the developing pregnancy, because the ultrasound probe lies closer to these structures.The transvaginal ultrasound probe is thin, about 2cm diameter.During the examination, the fetus is seen by abdominal ultrasound.