Comprehensive Chromosome Screening (CCS) is a technique that allows selection of the healthiest from a group of embryos. After in vitro fertilization, a few cells from each embryo are sent to the genetics lab and chromosomes are counted.
Shortness of breath has many causes affecting either the breathing passages and lungs or the heart or blood vessels. An average 150-pound (70 kilogram) adult will breath at an average rate of 14 breaths per minute at rest.Excessively rapid breathing is referred to as hyperventilation.hortness of breath has many causes affecting either the breathing passages and lungs or the heart or blood vessels. An average 150-pound (70 kilogram) adult will breath at an average rate of 14 breaths per minute at rest.
1 First Cause of Shortness of Breath: Body Demands More Air. 2  Second Cause of Shortness of Breath: Too Little Airflow. 3  Third Cause of Shortness of Breath: Trouble Transporting Oxygen in the Bloodstream.  Final Cause of Shortness of Breath: Lack of Oxygen in the Air. Sometimes, there's just nothing you can do to make things better. At high altitudes, the air is too thin to contain an adequate supply of oxygen for the body's needs.