Testing at five to six days. It is possible that instead of removing and testing one or two cells from a two â three day old embryo, some centres may allow the embryo to develop to five - six days, when there are 100-150 cells.
Long-term use of large amounts of vitamin A might cause serious side effects including fatigue, irritability, mental changes, anorexia, stomach discomfort, nausea, vomiting, mild fever, excessive sweating, and many other side effects.
Vitamin A-induced liver disease includes mild and reversible elevation in blood liver enzymes, hepatitis, chronic hepatitis with cirrhosis, and liver failure. The symptoms of vitamin A toxicity may include bone and muscle aches, orange discoloration of skin, fatigue, and headache.