Among the heart diseases, usually associated with the congenital heart block, is left atrial isomerism, with or without defect of atrioventtricular septums.  In addition, Levo`s transpositions may accompany the major arteries of CHB, but this is less common than the first.  Congenital external abnormality: a type of abnormality that can be identified by an examination during physical examination. The association models of the ICD-10 subcategory in the WAB are presented in Table 4. 24 cases (25%) had more than one disease in the same ICD-10 subcategory. “Congenital malformations of the circulatory system (Q20-Q28), “other congenital malformations of the digestive system (Q38-Q45) ” and “congenital malformations and deformities of the musculoskeletal system (Q65-Q79)” tended to be underestimated. Cleft lip and cleft gaulate (Q35-Q37)” has also tended to be associated with other birth defects. For 96 WABs, forty-four different combinations were detected at the icD-10 organ subcategory. But diseases that occur at a more detailed level of disease classification, namely the double-digit Q code (z.B Q21 for congenital heart defects) have rarely been observed. 84 cases of 96 WAB (88%) different combination models on the double-digit code depending on the Q level. The combination pattern, which is present in three or more cases in the subcategory of the organ system, was as follows: Q17 (other congenital ear defects) and Q21 (), Q21 and Q35 (palace cleft) (), and Q21 and Q37 (palace slit with cleft lips) (). Hospital-based monitoring program: a program to census all birth results with birth defects that occur in selected maternity units. This approach can be useful in places where most births take place in hospitals and where a population-based monitoring program is not feasible.
Spina bifida: a generic term used to describe a congenital defect of the spine caused by a failure of the rear elements of the vertebrae that closes, resulting in exposure of the meninge with or without the seeding of the spinal cord. It is most commonly found in the lumbar or sacred part of the spine and usually affects two or three vertebrae, although sometimes more vertebrae may be affected. Given the complex nature and severity of WABs, a higher early childhood death observed in the WAB group appeared appropriate than in the individual group. Because of the effect of ART , the proportion of multiple births among the subjects present was clearly higher than that of the general population. In addition, the prevalence of birth defects is higher in multiple births than in singletons [17, 18, 25-27].