This scan is performed between 12 weeks and 13 weeks + 6 days. In addition and only if requested we will also check the Nuchal translucency as part of the maternal serum screening (MSS1) for Downs Syndrome and other chromosomal abnormalities. The purpose of this scan is to check for your baby’s heart beat (viability), confirm the estimated due date, confirm the number of babies and evaluate the baby’s health. FIRST TRIMESTER SCAN +/- NUCHAL SCREENING – 12 WEEKS If there are any clinical indications determined by your midwife or doctor that an early scan is necessary (such as a suspected miscarriage or ectopic pregnancy) it can be requested, otherwise current guidelines state that the first ultrasound of the pregnancy should ideally be offered when the gestational age is thought to be between 12 weeks and 13 weeks + 6 days. Routine dating scans are no longer supported by the Ministry of Health. The scan takes approximately 15-30 minutes and requires no preparation.THE FOUR MOST COMMON STAGES TO HAVE AN ULTRASOUND. Your doctor may refer you for an ultrasound in the third trimester for a variety of reasons which may also relate to your family or past obstetric history or maternal medical conditions such as diabetes. The assessment allows the doctor to interpret the health of placental function. The role of the third trimester ultrasound is to assess fetal size, health and well being.
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