Any substance that causes growth abnormalities in embryos, genetic modifications in cells, etc.

an agent, as a chemical, disease, and so on, that causes malformation of a fetus.

A substance or agent, exposure to which by a pregnant female can result in malformations in the fetus.

a noxious substance, such as a virus or drug, that can cause prenatal defects. (114)

A term used to describe any agent, process or substance that interferes with normal fetal development. Teratogens can act either on the fetus directly or some supplemental structure such as the placental or maternal systems. The period of highest risk occurs between weeks 3 and 12 when internal organs and systems are developed. Teratogens include drugs, alchohol, infectious agents such as the rubella virus, radiation including x-rays and environmental factors such as maternal age and general health.

An agent with the potential of causing birth defects.

Literally, monster forming. Any drug or agent that will cause birth defects if taken during pregnancy.

Any agent that can cause birth defects.

an agent causing formation of a congenital anomaly or monstrosity. congenital

an agent which causes the fetus to develop abnormally.

Any substance, agent, or process that blocks normal growth of the fetus, causing one or more developmental abnormalities in the fetus.

A compound causing congenital malformations in the fetus (birth defects).

A stimulus that causes developmental defects.

An agent that causes congenital malformations in embryos.

A substance that causes fetal abnormalities.

A substance or agent to which exposure of a pregnant female can result in malformations in the fetus.

anything that causes abnormalities in a developing embryo or fetus, such as a drug or virus

F a toxic substance which is capable of being transported across the placenta from the bloodstream of the mother to the bloodstream of the embryo or foetus and causing miscarriage, congenital birth defects or illness.

Substance that causes physical birth defects in the offspring following exposure of the pregnant female.

Something causing physical defects in the developing embryo

Any substance capable of producing structural abnormalities of prenatal origin, present at birth or manifested shortly thereafter.

Any agent, such as a virus, drug or radiation, that can cause the malformation of an embryo or a fetus.

Nongenetic factor that can produce malformations of the fetus.

A substance that can cause deformities in embryos. Dioxin is a teratogen.

An material or agent causing physical defects in a developing embryo or fetus.

any agent that causes a structural abnormality following fetal exposure during pregnancy. The overall effect depends on dosage and time of exposure. Absolute risk - the rate of occurrence of an abnormal phenotype among individuals exposed to the agent. (e.g. fetal alcohol syndrome) Relative risk - the ratio of the rate of the condition among the exposed and the nonexposed. (e.g. smokers risk of having a low birth weight baby compared to non-smokers) A high relative risk may indicate a low absolute risk if the condition is rare.

a chemical agent or factor in the environment such as a drug, pollutant, or infection, which harms a developing embryo or fetus

a chemical or agent that causes birth defects in a child

a chemical which causes damage to a developing fetus, but the damage does not propagate across generational lines

a chemical which may cause genetic mutations or malformations in the developing foetus

a compound that can cause fetal damage

a compound which can cause genetic alterations in the next generations of the person

a drug, chemical, virus, physical agent or deficiency state that, by acting during the embryonic or fetal period, alters morphology or function in post-natal period

a drug or exposure that causes birth defects

an agent (such as virus, drugs and radiation) that is known to cause malformation in an embryo or fetus

an agent that can cause malformations of an embryo or fetus

an agent that causes birth defects

an agent that causes malformations in foetuses

an agent that causes physical or developmental abnormalities in the fetus

an agent that produces a malformation or raises the population incidence of malformation

an agent, which by acting on the developing embryo or foetus, can cause a structural anomaly

an agent, which can cause a birth defect

an environmental agent capable of producing birth defects

an environmental agent such as a drug, chemical, virus or pollutant which interferes with the normal development of the embryo or fetus

an environmental agent that can adversely affect the unborn child, thus producing a birth defect

a poison that alters the mitotic growth of cells and can selectively kill a fetus

a substance capable of producing abnormalities during intrauterine development that may show themselves before birth, at birth, or later on in life

a substance that causes a structural or functional birth defect

a substance that is capable of causing birth defects in a fetus

a substance that produces a malformation in a foetus

a substance which can cause birth defects

a substance with the potential to alter the form or function of the fetus

A chemical or physical agent that affects a developing embryo fetus and can cause birth defects in offspring. Such an agent is called teratogenic .

an exposure that interferes with normal fetal development, causing a birth defect. Known teratogens include certain illnesses in the mother (German measles, diabetes), medications (thalidomide, Dilantin) and other exposures (excessive alcohol).

An agent that causes physical abnormalities in a developing embryo or fetus.

A chemical or biological agent capable of causing malformations in embryos; a well-known example is thalidomide. Many of the chemicals in tobacco smoke are known teratogens.

A chemical or physical agent which can lead to malformations in the fetus and birth defects in children (liveborn offspring). Such an agent is called teratogenic. The ability to cause birth defects is termed teratogenicity.

A substance that alters the formation of cells, tissues and organs and which results in physiological and biochemical changes in a fetus during growth.

an agent causing defects in a developing foetus

A drug or agent that causes abnormal development of a fetus resulting in a birth defect.

teh-RAT-eh-jen Something that causes a birth defect. 246

A chemical or substance which causes abnormal formation of a fetus.

A chemical or physical agent or substance that can lead to non-heritable birth defects.

Compare? A substance capable of causing birth defects.

A substance that causes defective development in fetuses (birth defects).

A substance that can cause malformation in the fetus following exposure of the mother. The malformation or abnormality may be biochemical or anatomic and be of genetic or environmental origin.

An agent that produces or increases the incidence of birth defects or congenital abnormalities by interfering with development of the fetus during pregnancy.

A substance or mixture of substances that produces or induces birth defects.

A chemical that causes nonhereditary birth defects in a developing fetus. Teratogencity is taken into account in assessing the toxicity of pesticides and other chemicals. Both level and timing of exposure to teratogens determine health effects.

An agent or substance that may cause physical defects in the developing embryo or fetus when a pregnant female is exposed to that substance.

Substances that affects the genetic coding of an organism such that birth defects occur in subsequent offspring

A substance -- such as a chemical or radiation -- that can cause abnormal development of an embryo.

A substance that upon exposure to the parent causes malformations and/or alterations in the appearance or function of the foetus

A substance (e.g., a drug or other agent) that causes birth defects or malformations of the embryo or fetus.

toxic environmental agents that have been associated with fetal malformations/birth defects (drugs, chemicals, irradiation)

A chemical that has been demonstrated to cause physical defects in the developing embryo

Any compound or agent that disrupts normal development in utero, producing defects in the developing embryo.

any factor in the environment which can cause an abnormality in a developing embryo. Abnormalities can result from mutations induced by chemicals or radiation (carcinogens, mutagens) or by nutritional deficiencies.

Chemical and physical agents which interfere with normal embryonic development.  Teratogens may produce congenital malformations or death of the fetus without inducing damage to the pregnant female.

A chemical capable of producing reproductive harm or birth defects generally through cell dysmorphology.

An agent that interferes with normal development.

a chemical that can cause birth defects when experienced by a female before or during pregnancy

A chemical which damages a foetus so that it is born deformed is called a teratogen.

chemical which may cause genetic mutations or malformations in the developing fetus. Agents or compounds that a pregnant woman takes into her body that generate defects in the fetus.

Agent that, when administered prenatally (to the mother), induces permanent structural malformations or defects in the offspring

A drug, chemical, or infection that can cause a birth defect when a woman is exposed to it during pregnancy.

any agent that interferes with normal embryonic development

agent or substance which causes abnormalities in a developing embryo or fetus

an agent that has the potential to cause birth defects if exposure to a fetus occurs at a critical time in pregnancy.

a substance which causes congenital abnormalities (deformities) in the baby or offspring in the womb

An agent that causes physical defects in the developing embryo.

A substance that can cause the deformity of a fetus.

(teratogenic, teratogenicity) – Substance that causes defects in the developing embryo or fetus.

A teratogen is a substance that causes birth defects by damaging the fetus.

Any environmental agent that can cause deviations in prenatal development. Consequences may range from behavioral problems to death.

An agent, including certain medications, chemicals, and infections, that can cross the placenta when a woman is exposed to it during pregnancy, causing miscarriage or birth defects.

A chemical such as thalidomide that can cause birth defects by adversely altering the development of an embryo or fetus without necessarily altering the organism's genetic structure. Compare mutagen. find all NHC pages containing: teratogen

any environmental agent that causes abnormal development of a fetus

An agent that causes physical defects in a developing embryo.