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 B
Explanation
Choice A Reason: This is incorrect because maternal diabetes is a condition where the mother has high blood sugar levels during pregnancy. It can cause polyhydramnios, or excess amniotic fluid, not oligohydramnios, or low amniotic fluid.
Choice B Reason: This is correct because fetal anencephaly is a congenital defect where the fetus lacks parts of the brain and skull. It can cause oligohydramnios, as the fetus does not produce enough urine to contribute to the amniotic fluid volume.
Choice C Reason: This is incorrect because placental abruption is a complication where the placenta detaches from the uterine wall before delivery. It can cause bleeding, pain, and fetal distress, but not oligohydramnios.
Choice D Reason: This is incorrect because neural tube defects are congenital defects where the spinal cord or brain does not develop properly. They can cause various neurological problems, but not oligohydramnios.

Correct Answer is A
Explanation
Choice A Reason: This is correct because this response provides realistic and supportive advice for a woman who wants to have a baby with lupus. Lupus is an autoimmune disease that causes inflammation and damage to various organs and tissues. Lupus can affect fertility and pregnancy outcomes, such as increasing the risk of miscarriage, preterm delivery, preeclampsia, or neonatal lupus. Therefore, it is important for the woman to have her lupus under control before conceiving and to consult with her doctor about her treatment plan and prenatal care.
Choice B Reason: This is incorrect because this response is discouraging and insensitive for the woman who wants to have a baby with lupus. Lupus does not necessarily prevent a woman from having a healthy pregnancy and a healthy baby, as long as she follows her doctor's recommendations and monitors her condition closely. The nurse should respect the woman's reproductive choices and provide information and support.
Choice C Reason: This is incorrect because this response is inaccurate and misleading for the woman who wants to have a baby with lupus. Lupus can have various effects on pregnancy, such as causing flares or complications that can affect both the mother and the baby. The nurse should educate the woman about the possible risks and benefits of pregnancy with lupus and help her prepare for any challenges.
Choice D Reason: This is incorrect because this response is vague and alarming for the woman who wants to have a baby with lupus. Lupus treatment may or may not change during pregnancy, depending on the type and severity of lupus, the medications used, and the stage of pregnancy. The nurse should explain the rationale and safety of any medication changes and address any concerns or questions that the woman may have.

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