A client comes to the prenatal clinic for her first visit. When determining the client's estimated due date, the nurse understands that which method is the most accurate?

Choice A Reason: This is incorrect because hemoconcentration by hypertension is a condition where the blood volume decreases and the blood pressure increases, leading to a higher hemoglobin level. A normal hemoglobin level for a pregnant woman in her second trimester is 10.5 to 14 g/dL. A hemoglobin level of 11 g/dL is within the normal range, not indicative of hemoconcentration.

Choice B Reason: This is incorrect because a multiple gestation pregnancy is a pregnancy with more than one fetus, such as twins or triplets. A multiple gestation pregnancy can cause a lower hemoglobin level due to increased blood volume and increased demand for iron. A hemoglobin level of 11 g/dL is not suggestive of a multiple gestation pregnancy.

Choice C Reason: This is incorrect because greater-than-expected weight gain is not directly related to the hemoglobin level. Weight gain during pregnancy depends on various factors such as pre-pregnancy weight, nutrition, physical activity, and genetics. A hemoglobin level of 11 g/dL does not reflect the weight status of the pregnant client.

Choice D Reason: This is correct because iron-deficiency anemia is a common type of anemia that occurs when the body does not have enough iron to produce enough red blood cells. Iron-deficiency anemia can cause a low hemoglobin level and affect the oxygen delivery to the tissues and the fetus. A hemoglobin level of 11 g/dL may indicate iron-deficiency anemia, especially if the client has other symptoms such as fatigue, weakness, pale skin, or cravings for non-food items. The nurse should confirm the diagnosis with further tests and recommend iron supplements and dietary changes to treat the condition.

Choice A Reason: This is correct because breast tenderness is a common discomfort during the first trimester of pregnancy. It is caused by hormonal changes that stimulate breast growth and prepare them for lactation. Breast tenderness may also be accompanied by swelling, tingling, or sensitivity.

Choice B Reason: This is correct because urinary frequency is a common discomfort during the first trimester of pregnancy. It is caused by hormonal changes that increase blood flow to the kidneys and bladder, as well as by the growing uterus that puts pressure on the bladder. Urinary frequency may also be associated with increased thirst or urinary tract infections.

Choice C Reason: This is incorrect because backache is not a common discomfort during the first trimester of pregnancy. It usually occurs in later stages of pregnancy, when the weight of the fetus and the uterus shifts the center of gravity and strains the back muscles and ligaments. Backache may also be caused by poor posture, stress, or fatigue.

Choice D Reason: This is correct because cravings are a common discomfort during the first trimester of pregnancy. They are caused by hormonal changes that affect the sense of taste and smell, as well as by emotional or psychological factors. Cravings may vary from person to person and may include foods that are sweet, salty, sour, or spicy.

Choice E Reason: This is incorrect because leg cramps are not a common discomfort during the first trimester of pregnancy. They usually occur in later stages of pregnancy, when there is increased pressure on the nerves and blood vessels that supply the legs. Leg cramps may also be caused by dehydration, electrolyte imbalance, or muscle fatigue.