Normal Growth A child's growth not only involves the length and weight of his or her body, but also internal growth and development. Infant Immunization Quiz A pregnant woman passes antibodies to her unborn baby through the placenta to protect against certain diseases. How long does this natural immunity last? Toilet Training Quiz Answer this one: Which behaviors indicate that your child may be ready to learn to use the toilet? Learn the answer to this and other questions by taking this multiple choice quiz. Teen Health Quiz Take this multiple-choice quiz to answer your questions about teen health. Example: Routine physical examinations should be done how often during the teen years?