A nuchal translucency ultrasound (commonly called a ânuchal scanâ or âNT scanâ) is an ultrasound performed between 11.5 and 13 weeks 6 days gestation. It is usually part of an assessment called combined first trimester screening.he nuchal translucency is the fluid found at the back of your babyâs head and neck, just beneath the skin. The thickness of this fluid can be precisely measured and this is called the nuchal translucency (or NT) measurement.
Weather in Porto in September. The average maximum daytime temperature in Porto in September is a warm 24Â°C (75Â°F). There are usually 8 hours of bright sunshine each day, which represents 60% of the 12 hours of daylight. The average sea temperature in and around Porto in September is 18Â°C (64Â°F). Expect 62mm (2.4 inches) of rainfall across the whole of September with 8 days with some rain falling. Maximum UV levels will be high (6 UV index) at midday when the skies are clear.
This report describes the typical weather at the Portela Airport (Lisbon Airport) (Lisbon, Portugal) weather station over the course of an average year. It is based on the historical records from 1974 to 2012.Earlier records are either unavailable or unreliable.he warm season lasts from June 19 to September 22 with an average daily high temperature above 79AÂ°79Ã¢. F the hottest day of the year Is august, 4 with an average high OFÂ°84a 84Ã¢ f and LOWÂ°Of. 65a 65Ã¢ f the cold Season lasts from November 18 to march 7 with an average daily HIGHÂ°Temperature. below 63a 63Ã¢ f