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.
First Cause of Shortness of Breath: Body Demands More Air Creating a demand for more air than you're currently getting makes you feel short of breath. These are the most common causes of increased demand, either because you need to get rid of carbon dioxide or because your body needs more oxygen: