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Additional data on spontaneous abortion and facial cleft malformations.

J C Bear

    Clinical Genetics
    |December 1, 1983
    PubMed
    Summary

    This study found no increased risk of recognized abortion in families with cleft lip and palate (CL +/- P) or cleft palate (CP) compared to controls. These findings do not support a link between facial cleft malformations and fetal mortality.

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    Area of Science:

    • Genetics
    • Reproductive Medicine
    • Pediatric Medicine

    Background:

    • Facial cleft malformations, including cleft lip with or without cleft palate (CL +/- P) and cleft palate (CP), are common congenital anomalies.
    • Previous research suggested a potential association between the severity of facial cleft malformations and fetal wastage.
    • Understanding factors influencing fetal mortality in affected families is crucial for genetic counseling and reproductive health.

    Purpose of the Study:

    • To investigate whether the frequency of recognized abortion differs among sibships with varying types and laterality of facial clefts.
    • To evaluate the relationship between the degree of liability to facial cleft malformation and fetal mortality.
    • To compare findings with previous studies suggesting a positive correlation.

    Main Methods:

    • Analysis of fetal wastage data from a large cohort of sibships with CL +/- P and CP, previously reported by Bear (1978).
    • Comparison of abortion frequencies across different CL +/- P and CP index case categories (e.g., CL+P vs. CL, male vs. female, bilateral vs. unilateral).
    • Statistical examination to determine if increased liability to facial clefts correlates with higher fetal mortality.

    Main Results:

    • No significant difference in the frequency of recognized abortion was observed between sibships of CL+P and CL index cases.
    • Abortion rates did not vary based on the sex of CL +/- P index cases or the laterality (unilateral vs. bilateral) of CL +/- P.
    • No increased fetal mortality was found in relation to the degree of liability to facial cleft malformation, contradicting prior reports.

    Conclusions:

    • The study provides no evidence to support a positive association between the severity of facial cleft malformation and fetal mortality.
    • Findings fail to confirm previous reports suggesting a link between facial clefts and increased abortion rates.
    • Further research may be needed to fully elucidate the complex relationship between congenital anomalies and pregnancy outcomes.

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