What does teratogenesis mean?
Teratogenesis is the medical term for abnormal development of an embryo or fetus, particularly the formation of structural or functional malformations after exposure to a teratogen. Such an agent may be a drug, chemical, radiation, infection, or maternal condition. The process is not the same as a birth defect viewed only after delivery: it names the developmental process that produces the defect. Teratogenesis is chiefly used in medicine, toxicology, pharmacology, and public-health regulation, where specialists assess whether exposures during pregnancy can cause fetal harm. The word carries a clinical rather than everyday tone and is usually discussed as a risk or mechanism—for example, in drug-induced teratogenesis. Because timing can influence which organs are affected, teratogenic risk is often evaluated for particular stages of pregnancy. The term is useful because it distinguishes causes and processes of developmental abnormality from their visible outcomes, making it central to discussions of medication safety and prenatal care.
nounThe process of abnormal development in an embryo or fetus, especially the production of structural or functional malformations during pregnancy. It may result from exposure to a teratogen or from other causes.
- The abnormal development of an embryo or fetus, especially the production of congenital structural or functional malformations.
"Animal studies were conducted to determine whether the drug could cause teratogenesis."
"Animal studies were conducted to determine whether the drug could cause teratogenesis."
"Regulatory agencies evaluate a drug's teratogenic effects before approving it for use during pregnancy."
The plural is grammatically standard but rare; the singular is normally preferred because teratogenesis usually denotes one developmental process.
"Severe teratogeneses have been associated with exposure during critical developmental periods."
Teratogenesis joins roots meaning “monster” and “birth”: a once-gruesome label for malformed development, now a precise measure of fetal risk.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of teratogenesis
Teratogenesis combines the Greek roots teras, in the form teratos, meaning “monster, prodigy,” and genesis, meaning “origin, production, or birth.” The term developed in medical usage for the production of abnormal forms during embryonic or fetal development. Related English terms include teratogen, teratogenic, teratogenicity, and teratology.
Related word forms
How teratogenesis is actually used
This is a formal medical and toxicological term, usually used when discussing agents or exposures that disrupt prenatal development. It is not a general synonym for any congenital anomaly.
Easily confused with teratogenesis
Teratogenesis is the developmental process, whereas a teratogen is an agent capable of causing it.