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.
Aortic stenosis is a condition of the heart causing shortness of breath, dizziness, or chest pain. Atrial flutter is an abnormality of the heart's rhythm that causes rapid and sometimes irregular heartbeats. Pulmonary hypertension can cause shortness of breath, a fast heart rate, or lightheadedness.