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?
Nagele's rule
Ultrasound
Gestation wheel
Birth calculator
The Correct Answer is B
Choice A Reason: Nagele's rule is a formula that estimates the due date by subtracting three months from the first day of the last menstrual period and adding seven days. However, this method assumes a regular 28-day cycle and may not be accurate for women with irregular cycles or who are unsure of their last menstrual period.
Choice B Reason: Ultrasound is the most accurate method of determining the estimated due date, especially in the first trimester. Ultrasound uses sound waves to create an image of the fetus and measure its size and development. Ultrasound can also detect any abnormalities or complications that may affect the pregnancy.
Choice C Reason: Gestation wheel is a circular calendar that estimates the due date by aligning the first day of the last menstrual period with a corresponding date on the wheel. However, this method also assumes a regular 28-day cycle and may not account for variations in ovulation or implantation.
Choice D Reason: Birth calculator is an online tool that estimates the due date based on various factors such as the last menstrual period, cycle length, ovulation date, conception date, or ultrasound date. However, this method may not be reliable as it depends on the accuracy of the input data and the algorithm used by the calculator.

Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","D"]
Explanation
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.
Correct Answer is C
Explanation
Choice A Reason: This is incorrect because mosquitoes do not transmit HIV. HIV is a virus that infects human cells and cannot survive in insects. Mosquitoes do not inject blood from one person to another when they bite, but only saliva that contains anticoagulants and enzymes.
Choice B Reason: This is incorrect because accidental puncture wounds are not a common mode of HIV transmission. HIV can be transmitted through exposure to infected blood or body fluids, such as through needle sharing, blood transfusion, or occupational injury. However, these cases are rare and can be prevented by using sterile equipment, screening blood products, and following universal precautions.
Choice C Reason: This is correct because sexual contact is the most common mode of HIV transmission. HIV can be transmitted through unprotected vaginal, anal, or oral sex with an infected person, as these activities can involve contact with infected blood, semen, vaginal fluid, or pre-ejaculate.
Choice D Reason: This is incorrect because respiratory droplets do not transmit HIV. HIV is not an airborne virus and cannot be spread by coughing, sneezing, or breathing. HIV cannot be transmitted by casual contact, such as hugging, kissing, or sharing utensils.

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