According to What to Expect, common symptoms of pregnancy at nine weeks include fatigue, frequent urination, morning sickness, nausea and a thickening of the waistline. Other early pregnancy symptoms are swollen, tender breasts, light bleeding or cramping, a heightened sense of smell and food aversions or cravings. During the second trimester, energy levels of the mother rise once the placenta is fully formed and functional.
What to Expect recommends regular snacking to better compensate for the decreased energy levels of the mother in addition to the nutritional needs of the developing fetus. Larger meals can be difficult to finish due to the early symptoms of pregnancy, so smaller, lighter ones are often more effective. Smaller meals also reduce the chance of vomiting, as the stomach does not reach its capacity. It is also recommended not to choose foods that negatively trigger the body's heightened senses. Whole grain crackers and mild cheddar, which contains much-needed calcium, serve as a snack that many mothers do not find offensive.
At nine weeks of age, the developing fetus is approximately the size of a peanut, according to What to Expect. At this stage, the neck and head are beginning to differentiate, becoming more erect and developed. The liver, spleen and gallbladder are in the early stages of formation, while the first movements of the arms and legs occur as they begin to develop musculature. Ultrasound devices may be able to detect the fetal heart beat at nine weeks.