Pregnancy dating test

Dating scan

Error: This is required. Error: Not a valid value. A dating scan is an ultrasound scan done in the first trimester of pregnancy. Measurements of your baby are taken to estimate how long you have been pregnant. Many women ovulate release an egg that may then be fertilised and conceive about 2 weeks after their last period. So, the baby is due about 40 weeks after the beginning of their last period. If you have a regular day cycle, you can calculate an estimated due date for your baby. Count 40 weeks from the first day of your last menstrual period. If you think you may need a dating scan to help estimate when your baby is due, speak to your doctor or midwife. A dating scan is usually done between 8 and 14 weeks of pregnancy most often before 12 weeks.

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Back to Your pregnancy care. If you're pregnant in England you'll be offered an ultrasound scan at around 10 to 14 weeks of pregnancy. This is called the dating scan. It's used to see how far along in your pregnancy you are and check your baby's development.

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Pregnancy begins when an egg is fertilized by a sperm. Pregnancy ends at delivery, when a baby is born. If a menstrual period is a week or more late in a woman who usually has regular menstrual periods, she may be pregnant. Sometimes a woman may guess she is pregnant because she has typical symptoms.

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Detecting and Dating a Pregnancy

A range of tests are available if you are pregnant. There are also optional tests that can provide information about whether a pregnancy is affected by a range of conditions. Regular check-ups with your doctor or midwife are an important part of pregnancy care, including information and advice about what tests you and your baby will need. A missed menstrual period is usually the first sign of pregnancy.

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