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.
If the moon orbited in the same plane as the ecliptic â Earthâs orbital plane â we would have two eclipses every month. Thereâd be an eclipse of the moon at every full moon. And, two weeks later, thereâd be an eclipse of the sun at new moon for a total of at least 24 eclipses every year. But the moonâs orbit is inclined to Earthâs orbit by about 5 degrees. Twice a month the moon intersects the ecliptic â Earthâs orbital plane â at points called nodes.