A nurse in a prenatal clinic is caring for a client who is pregnant and asks the nurse for her estimated date of birth (EDB). The client's last menstrual period began on July 27. What is the client's EDB? (State the date in MMDD format. For example, July 27 is 0727.)
The Correct Answer is ["0504"]
To calculate the estimated date of birth (EDB), also known as the due date, we use Naegele's Rule, which involves adding one year, subtracting three months, and adding seven days to the first day of the last menstrual period (LMP). Using this rule, if the LMP was on July 27, the EDB would be:
- Add one year: July 27, 2024
- Subtract three months: April 27, 2024
- Add seven days: May 4, 2024
Therefore, the EDB in MMDD format is 0504.
Reason:
Naegele's Rule is a standard way of calculating the due date for a pregnancy. The rule estimates the expected date of delivery (EDD) by adding one year, subtracting three months, and adding seven days to the date of a woman's last menstrual period (LMP). This calculation assumes a regular menstrual cycle of 28 days and ovulation occurring on the 14th day of the cycle. The EDB is typically set at 40 weeks from the LMP, which is approximately 280 days. While this method provides an estimate, only about 4% of births occur on the exact due date, and most births occur within a range of two weeks before or after the estimated due date.
It's important to note that the EDB is an estimate and can be influenced by factors such as the length of menstrual cycles, the exact day of ovulation, and the date of conception. Ultrasounds and other prenatal tests can provide additional information to refine the due date estimate as the pregnancy progresses.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason:
Placental insufficiency is a significant cause of a newborn being small for gestational age. It occurs when the placenta cannot deliver an adequate supply of nutrients and oxygen to the fetus. This condition can result from several factors, including maternal hypertension, diabetes, and certain infections. Placental insufficiency leads to intrauterine growth restriction (IUGR), which is often diagnosed when a fetus's estimated weight is below the 10th percentile for its gestational age¹². The normal range for fetal growth varies, but a key indicator is the consistent growth along a certain percentile line on growth charts.
Choice B reason:
Fetal hyperinsulinemia is typically associated with mothers who have diabetes. Insulin acts as a growth hormone; thus, excessive insulin can lead to macrosomia, where the newborn is larger than normal for the gestational age, not smaller². Therefore, fetal hyperinsulinemia is not a likely cause of SGA.
Choice C reason:
Preterm delivery can result in a newborn being small for gestational age simply due to the fact that the baby is born before reaching full term and having the opportunity to achieve the expected in-utero growth. However, being born preterm does not necessarily mean the infant is SGA; it means the infant is smaller than full-term babies because they have had less time to grow in utero¹.
Choice D reason:
Perinatal asphyxia refers to a lack of oxygen to the fetus during the time immediately before, during, or after birth. While it can lead to various complications and is a serious condition, it is not a direct cause of a newborn being small for gestational age. Perinatal asphyxia can occur in infants of any gestational age or size².
Correct Answer is B
Explanation
Choice A reason:
The absence of vitamin K in newborns is a concern as it is essential for blood clotting. Newborns are at risk of vitamin K deficiency bleeding (VKDB), which can lead to serious bleeding issues but not typically jaundice. VKDB is preventable with a vitamin K injection at birth.
Choice B reason:
Physiologic jaundice is common in newborns and usually appears between the second and fourth day after birth. It occurs due to the baby's liver not being mature enough to get rid of bilirubin in the bloodstream. This type of jaundice is generally harmless and resolves on its own within two weeks.
Choice C reason:
Maternal cocaine abuse can have numerous adverse effects on a newborn, including premature birth and withdrawal symptoms, but it does not directly cause jaundice. The symptoms of cocaine exposure in newborns can include tremors, muscle spasms, and difficulty feeding.
Choice D reason:
Blood group incompatibility, such as Rh disease or ABO incompatibility, can lead to hemolytic disease of the newborn (HDN), which can cause jaundice. This occurs when the mother's antibodies attack the baby's red blood cells, leading to increased bilirubin levels.
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