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单词 Developmental toxicology
释义

Developmental toxicology

英语百科

Developmental toxicity

The first few weeks of embryogenesis in humans. Beginning at the fertilized egg, ending with the closing of the neural tube. The embryogenesis is the most crucial time for the action of any teratogenic substances resulting in birth
defects.
Cataracts in a child’s eyes due to Congenital Rubella Syndrome (CRS).
Facial characteristics that suggest the diagnosis of FAS.
Diethylstilbestrol (DES) Cervix- The cockscomb, collar, and pseudopolyp of cervix. Cockscomb (hoods) are markedly enlarged folds of cervical stroma and epithelium . Low, broad folds are collars (rims). A pseudopoly is that portion of the cervix which is medial to a constricting band (sulcus) and has on superficial examination the appearance of a polyp.

Developmental toxicity is any structural or functional alteration, reversible or irreversible, which interferes with homeostasis, normal growth, differentiation, development or behavior, and which is caused by environmental insult (including drugs, lifestyle factors such as alcohol, diet, and environmental toxic chemicals or physical factors). It is the study of adverse effects on the development of the organism resulting from exposure to toxic agents before conception (either parent), during prenatal development, or post-natally until puberty. The substance that causes developmental toxicity from embryonic stage to birth is called teratogens. The effect of the developmental toxicants depends on the type of substance, dose and duration and time of exposure.

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更新时间:2025/6/17 0:58:38