The First Trimester Screen is a new, optional non-invasive evaluation that combines a maternal blood screening test with an ultrasound evaluation of the fetus to identify risk for specific chromosomal abnormalities, including Down Syndrome Trisomy-21 and Trisomy-18.
According to NASA, the next total lunar eclipse will be on January 31, 2018, and will be seen in Asia, Australia and North America. Penumbral lunar eclipses will occur on March 23, 2016, September 16, 2016, and February 11, 2017. Penumbral eclipses are more difficult to observe because only part of the moon is eclipsed.
View gallery - 2 images. Combining elevation data gathered by the Lunar Reconnaissance Orbiter (LRO) with Earth topography data, NASA researchers have produced the most accurate map ever created for the path of totality of the total solar eclipse that will be seen across a large swath of the United States on Monday, August 21 this year.