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A teratogen is an agent that causes birth defects.
A teratogen is a factor that causes birth defects.
The four causes of birth defects are body metabolism,function of structure, and heart.
born in the wrong age
Heart defects tend to run in families. So, a medical history is important. However, there are many other causes of heart defects - such as smoking, drinking, hot tubing, taking drugs/medicines during pregnancy. There are also many unknown causes of heart defects. More research is needed to discover these unknown causes.
There are many issues that can effect the quality of wood & timber. Defects usually mean that a quality piece of timber can be sold at a discounted price.
old age, deterioration, and birth defects are the most common.
vitamin b(folic acid)
cutting trees
The cause of esophageal atresia, like that of most birth defects, is unknown.
Congenital heart defects are errors in the development of the heart structure.
Myth: I've heard that the pill causes birth defects. The Truth: The pill does not cause birth defects or affect the health of future children