Accuracy of dating pregnancy tests

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Every month, as a part of a normal menstrual cycle, a woman ovulates ovary releases a mature egg. After intercourse, sperm travel through the uterus and into the fallopian tubes towards the egg. If a sperm successfully enters and fertilizes a mature egg, conception occurs. At this instant, characteristics such as gender, skin, and hair colour are determined from the parent's genes.

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LONDON — A home digital pregnancy test is able to correctly estimate the likely week of conception, according to the results of a month, prospective observational study of 1, nonpregnant U.

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Every pregnant woman wants to know her due dateand a due date that is calculated from her last menstrual period with a due date calculator often doesn't match the due date that is estimated by her first ultrasound also known as a sonogram. During an ultrasound, a technician will spread a warm gel over the lower part of your abdomen and then press a tool called a transducer against your belly to examine your fetus using sound waves. An image of your fetus will appear on an accompanying computer screen and while looking at this image, the technician will take some standard measurements from different angles and listen for a heartbeat.

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