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.
Side Effects of Vitamin B Complex. Side effects of taking a B vitamin complex are not common, especially if the patient takes the medication as prescribed amount. Taking excessive amounts of a vitamin B complex can cause side effects.An overdose is signaled by: dizziness, frequent urination, change in the color of the urine, black stools, constipation, diarrhea, abdominal pain, nausea, vomiting, redness of the skin and itching.ide effects of taking a B vitamin complex are not common, especially if the patient takes the medication as prescribed amount.