Your textbook describes three different periods of prenatal development, pages 76 – 80. List the stages of each period.What are the characteristics of Fetal Alcohol Syndrome? How much alcohol can a pregnant woman safely consume? Is alcohol considered a teratogen?How does a physician attending a woman in labor know how much of a drug should be used?Sarah has just arrived. On the Apgar her heart rate is 1, her respiratory effort is 1, muscle tone is 5, body color is 0 and reflex irritability is 1. What does her score indicate?