Related Questions
Correct Answer is C
Explanation
Choice A Reason: This is incorrect because administering Rho(D) immune globulin 24 hours before delivery is too early and may not provide adequate protection for the fetus. Administering it 24 hours after delivery is too late and may not prevent the mother from developing antibodies against the fetal Rh-positive blood cells.
Choice B Reason: This is incorrect because administering Rho(D) immune globulin in the first trimester is unnecessary and may not be effective, as the risk of Rh isoimmunization is very low before 28 weeks of gestation. Administering it within 2 hours of delivery is appropriate, but not sufficient, as it should be repeated within 72 hours after delivery.
Choice C Reason: This is correct because administering Rho(D) immune globulin at 28 weeks gestation and again within 72 hours after delivery is the recommended schedule for preventing Rh isoimmunization in Rh-negative pregnant women who have Rh-positive partners. This regimen can prevent up to 99% of cases of Rh isoimmunization by blocking the maternal immune response to the fetal Rh-positive blood cells.
Choice D Reason: This is incorrect because administering Rho(D) immune globulin at 32 weeks gestation is too late and may not prevent Rh isoimmunization if there has been any fetal-maternal hemorrhage before that time. Administering it immediately before discharge is also too late and may not prevent the mother from developing antibodies against the fetal Rh-positive blood cells.
Correct Answer is B
Explanation
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.

