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 (tə-răt′ə-jən, tĕr′ə-tə-)
An agent, such as a virus, a drug, or radiation, that causes malformation of an embryo or fetus.


(ˈtɛrətədʒən; tɪˈrætə-)
(Medicine) any substance, organism, or process that causes malformations in a fetus. Teratogens include certain drugs (such as thalidomide), infections (such as German measles), and ionizing radiation
ˌteratoˈgenic adj
ˌteratoˈgenicist n
ˌteratogeˈnicity n


(təˈræt ə dʒən, -ˌdʒɛn)

a drug or other substance capable of interfering with the development of a fetus, causing birth defects.
te•rat`o•gen′ic, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.teratogen - any agent that interferes with normal embryonic development: alcohol or thalidomide or X-rays or rubella are examples
thalidomide - a sedative and hypnotic drug; withdrawn from sale after discovered to cause severe birth defects because it inhibits angiogenesis
agent - an active and efficient cause; capable of producing a certain effect; "their research uncovered new disease agents"


n. teratógeno, agente que causa teratogénesis.
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References in periodicals archive ?
Methimazole is a known teratogen associated with this condition hence should be avoided in pregnancy.
Hecht reminds us that spironolactone is a teratogen and using effective contraception can help reduce the risk of exposing a pregnancy to the medication.
A method for human teratogen detection by geometrically confined cell differentiation and migration," Scientific Reports, 2015; 5: 10038 DOI: 10.
The toll-free hotline (1-866-626-6847) connects women and health care providers to teratogen information specialists, while the website includes fact sheets on medications and other exposures.
also take issue with benzene exposure as a plausible explanation for our findings because they assert that benzene is not a proven teratogen.
KARACHI -- Congenital disabilities that affect a significant number of people are often caused due to teratogen, medication high in toxic value and contaminated water that lead to growth of abnormal cell tissue in unborn during fetal growth, said researchers in a session organised by Dow University of Health Sciences (DUHS).
A checklist was compiled to collect the following data: patient particulars, parental dates of birth, details of the pregnancy (including birth order, teratogen exposure, mode of delivery and outcomes of the pregnancy) where available, a detailed pedigree analysis, history, type of lesion and associated malformations in the affected child, and the occurrence of other abnormalities and pregnancy outcomes in parents of a child with an NTD.
Another possibility is a teratogen, which is a birth defect-inducing toxicant along the lines of thalidomide.
12-14 But Holmes15 stated that there is no teratogen associated with sirenomelia.
Animal studies have suggested that the drug is a teratogen.
The sites of cell death vary depending upon the teratogen (or genetic insult) and the exposure time (i.