According to Pilitteri (2003), teratogen is defined as any agent, substance or environmental factors which can cause abnormalities when a developing embryo is exposed to it during pregnancy. Bellinger (2005) points out that there are billions of potential teratogens and it can be found at anywhere, such as home or workplace. For example, teratogen can be tobacco, alcohol, medications, infectious agents, chemicals or even radiation can cause abnormal foetal development (Bellinger, 2005). A study by Meyers (1983) shows that teratogen can cause serious congenital malformation or a birth defect in a child. In a recent report, New Zealand Birth Defects Registry (2014) states that there were 85.2 in 1,000 babies with birth defects in New Zealand in 2014. The report also said that the most common …show more content…
In 2003, Pilitteri described that teratogens have been considered to have negative impact on both the foetus and the mother during pregnancy. Meanwhile, the pregnant women who are exposed to high levels of teratogens during the foetus development stages can increase the risk of causing physical or mental abnormalities in a baby (Yaffe & Aranda, 2010). Therefore, the effects of teratogen on a foetus development are permanent and irreversible (Yaffe & Aranda, 2010). Although there are many different teratogens around us and can cause birth defects, only alcohol and tobacco will be explained and discussed in the following