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Teratology is the study of abnormalities of physiological development in organisms during their life span. It is a sub-discipline in medical genetics which focuses on the classification of congenital abnormalities in dysmorphology caused by teratogens and also in pharmacology and toxicology .
Teratology of fallot is typically treated by open heart surgery in the first year of life. [8] The timing of surgery depends on the baby's symptoms and size. [ 8 ] The procedure involves increasing the size of the pulmonary valve and pulmonary arteries and repairing the ventricular septal defect. [ 8 ]
Maternal impression, according to a long-discredited medical theory, was a phenomenon that explained the existence of birth defects and congenital disorders. The theory stated that an emotional stimulus experienced by a pregnant woman could influence the development of the fetus.
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Thalidomide is a known human teratogen and carries an extremely high risk of severe, life-threatening birth defects if administered or taken during pregnancy. [6] It causes skeletal deformities such as amelia (absence of legs and/or arms), absence of bones, and phocomelia (malformation of the limbs).
Birth defects may result from genetic or chromosomal disorders, exposure to certain medications or chemicals, or certain infections during pregnancy. [4] Risk factors include folate deficiency, drinking alcohol or smoking during pregnancy, poorly controlled diabetes, and a mother over the age of 35 years old.
James G. Wilson (1915–1987) was an embryologist and anatomist, known for his Six Principles of Teratology. In 1960, he co-founded The Teratology Society, and was since then one of its most active members.
A heterotopic pregnancy is a complication of pregnancy in which both extrauterine pregnancy and intrauterine pregnancy occur simultaneously. [2] It may also be referred to as a combined ectopic pregnancy, multiple‑sited pregnancy, or coincident pregnancy. The most common site of the extrauterine pregnancy is the fallopian tube.