A woman is 28 weeks pregnant with twins. The ultrasound reveals that one twin is a boy and the other is a girl. The woman asks if her babies will be identical. The nurse will base her answer upon which of the following information.

Genetic testing when the babies are delivered will need to be done to determine this.

They are dizygotic because the ultrasound shows one is bigger than the other.

The twins are dizygotic because they are not the same sex

They are monozygotic because they are in different amniotic sacs.

Answer and Explanation

The Correct Answer is C

A. Genetic testing is not necessary to determine if the twins are identical. Identical twins come from the same egg, while fraternal twins come from separate eggs.

B. The size difference alone does not determine whether twins are identical or fraternal.

C. Dizygotic twins (fraternal twins) are always of different sexes. This is because they are fertilized by two separate sperm and develop from two separate eggs.

D. Monozygotic twins (identical twins) occur when one fertilized egg splits into two embryos. The fact that they are different sexes rules out the possibility of monozygotic twins.

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Correct Answer is C

Explanation

A. May 1 is not correct; this would be too early by several months.

B. July 8 is not correct; this date is too far out for the due date based on the LMP provided.

C. To calculate the due date using Naegele's rule, you add 7 days to the first day of the last menstrual period (LMP) and then subtract 3 months. Given: LMP: April 15th Step 1: Add 7 days to the LMP: April15th + 7 days= April 22nd Step 2: Subtract 3 months: April22nd – 3 months = January 22nd

D. January 22 is close but not the correct date by the standard calculation of 280 days.

A. "They both have bright red bleeding." B. "One can be seen on ultrasound and the other cannot." C. "Abruptio may cause severe abdominal pain." D. "Placenta previa is treated by induction of labor."

Correct Answer is C

Explanation

A. Both placenta abruptio and placenta previa can involve bright red bleeding, though their underlying causes and presentations differ. Therefore, this statement is not entirely accurate.

B. Placenta previa is usually visible on ultrasound, while placenta abruptio is diagnosed based on clinical signs (bleeding, pain) and ultrasound when available.

C. Abruptio placenta can cause severe abdominal pain due to the separation of the placenta from the uterine wall. This is a key distinguishing feature from placenta previa, which typically does not cause pain.

D. Placenta previa is not treated by induction of labor unless it is term and the placenta is low-lying. It is typically managed by planned cesarean delivery.

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A woman is 28 weeks pregnant with twins. The ultrasound reveals that one twin is a boy and the other is a girl. The woman asks if her babies will be identical. The nurse will base her answer upon which of the following information.

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Naxlex Comprehensive Predictor Exams

The nurse working in the prenatal clinic has a patient who states her last menstrual period was April 15th. Using Nagelle's rule, what is her due date?

Correct Answer is C

Explanation

The nurse is teaching a new nurse about the difference between placenta abruptio and placenta previa. Teaching was effective when the new nurse states which of the following statements

Correct Answer is C

Explanation

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