Teratogen is a substance that introduces risk to the developing organism during pregnancy.
The impact of teratogens on pregnancy or a fetus depends on several factors. The timing and length of exposure, the stage of pregnancy when the exposure happened, whether a parent’s genes make them more susceptible, and the type of agent they were exposed to all contribute to the risk.
Teratogens generally fall under the following categories:- Drugs, Infections, Physical Agents ,Environmental Toxins & Maternal Health Conditions.
If a teratogen has the ability to affect the development of the neural tube, the exposure would need to occur before the time the neural tube closes, which is around three to four weeks. Some organ systems are susceptible throughout pregnancy, though.
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