Malformation n. : Ill formation; irregular or anomalous formation; abnormal or wrong conformation or structure.

Example:
Can an Antiepileptic medication cause Malformation or autism in a 22 weeks pregnancy?

Taxonomy
birth defects, Congenital disorder, abnormalities, disorder, body part, anomaly, free encyclopedia, congenital malformation, genes, chromosome, interactions, single-gene defects, Congenital disorders, minor anomalies, chromosomal abnormalities, diseases, gene defects, search.

Defination from the web:
malformation is a congenital physical anomaly that is deleterious, i.e. a structural defect perceived as a problem. ... ICD-10 Chapter Q: Congenital malformations, deformations and chromosomal abnormalities. List of ICD-9 codes 740-759: Congenital anomalies. Mitochondrial disease ...