Education. Dermatology is one of the most highly competitive medical fields, and requires several years of education and training. The first step is an undergraduate degree from a four-year college, including pre-medical courses in biology, organic chemistry, physics, and chemistry.
Diagnosing Down Syndrome. Down syndrome is typically diagnosed during pregnancy or shortly after birth. Learn about the screenings available and what they mean.
When some or all of a person's cells have an extra full or partial copy of chromosome 21, the result is Down syndrome. The most common form of Down syndrome is known as Trisomy 21, a condition where individuals have 47 chromosomes in each cell instead of 46.This is caused by an error in cell division called nondisjunction, which leaves a sperm or egg cell with an extra copy of chromosome 21 before or at conception.he only factor known to affect the probability of having a baby with Down syndrome is maternal age. That is, less than one in 1,000 pregnancies for mothers less than 30 years of age results in a baby with Down syndrome. For mothers who are 44 years of age, about 1 in 35 pregnancies results in a baby with Down syndrome.