Drag the words into the correct boxes using terminology from the textbook. There are three stages of prenatal development: germinal embryonic and fetal The germinal stage describes the approximately first two weeks of prenatal development where, after conception, the fertilized egg begins to divide and implants in the uterine wall. It is in this stage that membranes support the development of critical structures of the umbilical cord and the blood vessels of the placenta which serves as a relay station for nutrients and waste between the mother and fetus. The embryonic stage begins with implantation and covers the first two months, during which major organ systems differentiate. Development in this stage follows cephalocaudal and proximaldistal trends, meaning that development patterns are head to tail and near to far. In this stage, sex differentiation occurs and by the end of the embryonic stage teeth buds have formed, the liver is producing red blood cells, and the kidneys are filtering acid from the blood. The fetal stage lasts from the beginning of the third month of pregnancy until birth, during which organ systems mature and there are dramatic gains in size During prenatal development, there are several environmental influences or agents, known as teratogens that can damage the embryo or fetus, While the fetal stage is not usually susceptible to teratogens, exposure to particular teratogens can be most harmful during critical periods that correspond to times when organs are developing during the germinal and embryonic stages, More major abnormalities are likely to occur in the embryonic stage than the fetal stage. Infections, like sexually transmit.,. or viral illnesses like rubella can cause birth defects, cardiac issues, low birth weight, or lead to miscarriage or stillbirth, Importantly, maternal health is critical for the developing fetus and it is important to understand that even commonly used medications should be reviewed by the mother's medical professionals. Next >