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Biomedical subjects

W Mengel

Publications and source records attributed to W Mengel.

3 recordsLinked to original sources

Predicting school failure from information available at birth.

Information available from birth certificates was used to predict the psychological and educational status of approximately 1,000 randomly sampled first-grade children. The purpose of the research was to explore the feasibility of using birth certificate information as a cost-effective mechanism to identify children who were likely to need special educational services at public school entry. Multiple-regression and discriminant-function analyses revealed the following factors to be important in predicting psychoeducational status: birth order, race, educational status of the mother, month prenatal care began, survivorship of older siblings, and the child's legitimacy.

Achievement

Cryptorchism.

Our results from 121 patients as well as data from the literature prove that fertility rates after treatment of uni- or bilateral cryptorchism remain unsatisfactory. There is no statistically significant difference in fertility between a group of patients treated with human-chorionic-gonadotrophin and another group treated by orchidopexy after unsuccessful hormonal therapy. On the other hand, late results in unilateral cryptorchism are to a statistically significant extent better than in bilateral cryptorchism (46/29%). According to our histological findings in maldescended testicles, early treatment (before the age of 3 years) is advocated.

Age Factors

[Morphologic changes in cryptorchism (author's transl)].

Histologic changes caused by malposition occur in the undescended testicle after the second year of life. Histologic changes like those seen in the human are found in experimental cryptorchism in dogs. The same pathologic changes also occur in the unilaterally descended testicle. The results of preliminary experiments in dogs allow the statement that in unilateral cryptorchism the damage to the contralateral, descended, testicle is produced by an autoimmunologic mechanism.

Animals