Vitamin A (retinol) is an essential vitamin in the daily functioning of human beings that helps regulate cellular differentiation [2] of epithelial tissue. Studies have shown that an excess of vitamin A can affect embryonic development and result in teratogenesis, or the production of birth defects [3] in a developing embryo. Excess intake of vitamin A and retinoids by pregnant women often resu...

Vitamin A (retinol) is an essential vitamin in the daily functioning of human beings that helps regulate cellular differentiation [2] of epithelial tissue. Studies have shown that an excess of vitamin A can affect embryonic development and result in teratogenesis, or the production of birth defects [3] in a developing embryo. Excess intake of vitamin A and retinoids by pregnant women often resu...

Vitamin A (retinol) is an essential vitamin in the daily functioning of human beings that helps regulate cellular differentiation [2] of epithelial tissue. Studies have shown that an excess of vitamin A can affect embryonic development and result in teratogenesis, or the production of birth defects [3] in a developing embryo. Excess intake of vitamin A and retinoids by pregnant women often resu...

Numerous factors hinder our ability to recognize fully human teratogens. Among these are the limitations of animal and epidemiologic studies, the lack of understanding of the mechanisms of action of most teratogens, and the variability in expression of the clinical manifestation. Dose and timing of exposure, interactions with other environmental agents, and host susceptibility influence this va...

BACKGROUND AND OBJECTIVES Rates of adult women receiving contraceptive provision when simultaneously prescribed a known teratogen are alarmingly low. The prevalence of this behavior among pediatric providers and their adolescent patients is unknown. The objective of this study was to describe pediatric provider behaviors for prescribing teratogens concurrently with counseling, referral, and/or ...

Congenital diseases are damaging to the fetus and have an influence on length of pregnancy. Some congenital problems can still be fixed after birth, however costs significant. Prophylaxis is strongly advocated reduce risk abnormalities during preconception. The incidence anomalies in first pregnancy associated with a 2.5-fold increased recurrence future pregnancies. likelihood more than 24 time...