Embryotoxicity refers to the harmful effects that certain substances can have on developing embryos during pregnancy. These substances can include chemicals, drugs, or environmental toxins that interfere with normal growth and development. Exposure to embryotoxic agents can lead to birth defects, developmental delays, or even miscarriage. The study of embryotoxicity is important in fields like toxicology and pharmacology, as it helps identify risks associated with various exposures during pregnancy. Regulatory agencies often assess the safety of medications and chemicals to ensure they do not pose a threat to the developing embryo, thereby protecting maternal and fetal health.