Recent studies have shown that consuming more than 300 milligrams of caffeine a day will increase ones chances of a miscarriage, and based on studies on animals, high levels of caffeine may also cause birth defects, preterm delivery, reduced fertility and low birth weight.
Fragile X syndrome is the most common inherited cause of intellectual disability and one of the most common genetic disorders associated with autism. The signs and symptoms of fragile X syndrome can vary between individuals, and symptoms in males are usually more significant than in females. The syndrome occurs in approximately 1 in 3,600 males and 1 in 4,000-6,000 females.
Males have only one X chromosome, which is inherited from the mother at conception, and they receive a Y chromosome from the father. Females inherit two X chromosomes, one from each parent. Fragile X syndrome is caused by a mutation in a gene called FMR-1.This gene is located on the X chromosome.The FMR-1 gene is thought to play an important role in the development of the brain, but the exact way that the gene acts in the body is not fully understood.ragile X syndrome is the most common form of inherited mental retardation. Individuals with this condition have developmental delay, variable levels of mental retardation, and behavioral and emotional difficulties.