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The primary audience for this course are existing database professionals with experience of SQL Server 2014 who want to update their skills to SQL Server 2016.

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Having a scan in the first few months of pregnancy can be a thrilling experience.It's amazing to see the little blob with a heartbeat that will soon become your baby.He/she is looking for the length from the crown of the head to the "rump." They call that the CRL or crown to rump length.They base an approximation of when the baby is due on that CRL.You may have calculated the length of your pregnancy from the first day of your last menstrual period (LMP).However, conception doesn't actually occur until around 14 days after your LMP, or later if your cycle is longer than 28 days. The rhetoric of "natural" in natural childbirth: childbearing women's perspectives on prolonged pregnancy and induction of labour.The date of the first documented positive pregnancy test and the beta-human chorionic gonadotropin (b HCG) level may help ascertain the minimum gestational age.In women who conceived following assisted reproduction techniques, the date of embryo transfer is known and may date the pregnancy accurately.

Ask your GP if you want to have one anyway for extra reassurance, as she may be able to refer you.

Use our Pregnancy Calculator to calculate these dates for you.

If the mother has a regular period and knows the first day of her last menstrual period, gestational age can be calculated from this date.

Measuring the baby using ultrasound is most accurate in early pregnancy. The best time to estimate gestational age using ultrasound is between the 8th and 18th weeks of pregnancy.

The most accurate way to determine gestational age is using the first day of the woman’s last menstrual period and confirming this gestational age with the measurement from an ultrasound exam.