Making childbirth defects review the subject of the article presupposes the necessity of providing detailed account of the types of birth defects as well as the causes that trigger the appearance of them. In fact, accounts of childbirth defects have been given from time immemorial when crippled of malformed babies were drawn on the cave walls. Back then giving birth to a disabled child was regarded as a sign of the parents having led an unrighteous lifestyle. Therefore when such baby was born his parents were condemned as the community took it as a sign from above. It was not until the medical science reached a pronounced level of development that the actual physical causes of childbirth defects were defined. It is not secret now that most of defects , considered childbirth defects review, are caused by errors taking place within chromosomes. However, when providing a childbirth defects review and outlining their causes it is necessary not to leave out of the spotlight the environmental factors that may also produce a serious impact on the condition of the child and may have almost as much relevance as the alterations in genes. It seems appropriate to start the childbirth defects review with one of the most well known birth defect that is considered rather common, it is the Down syndrome. It has been proven that it has direct connection with the formation of the reproductive cells on the genetic level. Down syndrome is a rather common condition that may affect people regardless of their race or economic condition. The genetic cause of the condition of Down syndrome is the extra chromosome that is contained in the cell of every child with Down syndrome. The extra chromosome can be passed to the baby from either of the parents, as a result of a malfunction of the cell division process, the cause of which is still unknown. It is believed that the risk of giving birth to a child with Down syndrome increases with age, but in fact the statistics of childbirth defects review clearly testifies that the majority of children with birth defects are born by women who are under 35. Childbirth defects review should not overlook such conditions as clett lip and progeria. They are believed to be conditions that are caused by both the internal and the environmental factors. That is to say that it is possible for the mother to reduce the risk of her baby developing a certain condition or alleviate the disorder once it is present. Childbirth defects review states that it is always possible to determine the risk there is that the child will develop a certain disorder. In order to make sure that you child is formed and developing well it is possible to go through prenatal testing. In the course of this testing a specific blood test will be able to reveal whether there is a chance of the baby developing a certain disorder. In the event of early diagnosis it may be in some specific cases possible for the woman to improve the condition of her child by certain vitamin consumption.