A nurse is performing Leopold maneuvers on a woman at 36 weeks gestation.

The physician wants to know if the baby is in a favorable position for vaginal delivery.

Which information can the nurse obtain from this assessment? Select all that apply.

Choice A rationale

Hegar sign is the softening and compressibility of the lower uterine segment, which is the isthmus. This typically occurs around 6 to 12 weeks of gestation and is identified during a bimanual examination. It is a probable sign of pregnancy resulting from increased pelvic congestion and hormonal influences on connective tissue. The nurse documents this specific finding when the lower part of the uterus feels thin and soft compared to the firmer cervix and fundus.

Choice B rationale

Chadwick sign refers to the bluish-purple discoloration of the vaginal mucosa and cervix. This occurs as early as 6 to 8 weeks of pregnancy due to increased vascularity and pelvic congestion stimulated by estrogen. While it is a probable sign of pregnancy, it describes a visual color change rather than the tactile softening of the lower uterine segment. It is often one of the first physical signs noted by a practitioner during a speculum examination in early prenatal care.

Choice C rationale

Goodell sign is the softening of the cervical tip, which is often compared to the feeling of an earlobe or lips rather than the firm tip of the nose. This change usually becomes evident around the beginning of the second month of pregnancy. This softening is caused by increased vascularity, hypertrophy, and hyperplasia of the cervical glands. While it is an objective probable sign, it specifically describes the cervix rather than the lower uterine segment or isthmus.

Choice D rationale

McDonald sign is characterized by the ease with which the body of the uterus can be flexed against the cervix. This occurs because of the softening of the uterine isthmus, similar to Hegar sign, but it specifically refers to the flexibility or hinging effect noted during bimanual manipulation. While related to the softening of the uterine tissues, it is a distinct clinical finding used to assess the progress of pregnancy-related anatomical changes during a comprehensive pelvic examination.

Choice A rationale

While protein is essential for overall health, it is not the primary nutrient responsible for preventing anemia. Anemia in pregnancy is most commonly caused by a deficiency in iron, which is necessary for hemoglobin synthesis, or folic acid and vitamin B12, which are required for red blood cell maturation. Although some protein sources also contain iron, stating that protein alone prevents anemia is scientifically incomplete and misidentifies the specific biochemical role of iron.

Choice B rationale

Gestational diabetes is primarily a disorder of carbohydrate metabolism and insulin resistance, often influenced by placental hormones like human placental lactogen. While a balanced diet including protein is important for glycemic control, eating protein does not inherently prevent the development of diabetes. Management of diabetes risk involves monitoring total caloric intake, complex carbohydrate consumption, and physical activity rather than relying solely on protein intake to prevent the metabolic condition from occurring.

Choice C rationale

Protein is the fundamental building block for all biological tissues, consisting of amino acids required for the synthesis of new cellular structures. During pregnancy, protein requirements increase significantly to support the rapid hypertrophy and hyperplasia of fetal tissues, placental development, and the expansion of maternal blood volume and uterine tissues. Adequate nitrogen balance is crucial for the structural integrity of the developing fetus, making this statement the most accurate reflection of protein's biological role.

Choice D rationale

While protein provides the structural matrix for many tissues, the primary nutrients required for the formation of strong teeth and bones are calcium, phosphorus, and vitamin D. These minerals are deposited into the collagen matrix to ensure proper mineralization and hardness of dental structures. Protein deficiency could theoretically affect the organic matrix, but the specific strength and health of teeth are more directly linked to mineral metabolism and adequate intake of fat-soluble vitamins.