A 32-year-old woman is dilated 4 cm. The health care provider states that she has a roomy pelvis and the baby is in a right occiput anterior (ROA) position at +1 station. Her contractions are occurring every 10 minutes, lasting 30 to 40 seconds, and palpate mild in intensity. She is calm and relaxed. Given these data, which essential component of labor is unexpected and likely to slow the progress of labor at this time?

A. Passageway – Incorrect; the provider states she has a roomy pelvis, meaning the passageway is adequate.

B. Powers – Correct; contractions are infrequent (every 10 minutes), short (30-40 sec), and mild, which may not be strong enough to promote cervical dilation and descent of the fetus.

C. Psyche – Incorrect; the patient is calm and relaxed, which supports labor progression.

D. Passenger – Incorrect; the baby is in an optimal (ROA) position and at +1 station, indicating normal progression.

A. Gravidity (G): The total number of pregnancies, including the current one. She has had 3 prior pregnancies and is currently pregnant, making her G4. Term (T): Number of term births (37 weeks or later). She has had two sets of twins delivered at 37 and 38 weeks, so T2. Preterm (P): Number of preterm births (between 20 and 36 weeks 6 days). She has one son born at 34 weeks, so P1. Abortions (A): Number of pregnancies ending in miscarriage or abortion before 20 weeks. She has no history of miscarriage or abortion, so A0. Living (L): Number of living children. She has two sets of twins (4 children) and her 9-year-old son (1 child), making a total of L5.
B. Gravidity (G): The total number of pregnancies, including the current one. She has had 3 prior pregnancies and is currently pregnant, making her G4. Term (T): Number of term births (37 weeks or later). She has had two sets of twins delivered at 37 and 38 weeks, so T2. Preterm (P): Number of preterm births (between 20 and 36 weeks 6 days). She has one son born at 34 weeks, so P1. Abortions (A): Number of pregnancies ending in miscarriage or abortion before 20 weeks. She has no history of miscarriage or abortion, so A0. Living (L): Number of living children. She has two sets of twins (4 children) and her 9-year-old son (1 child), making a total of L5.
C. Gravidity (G): The total number of pregnancies, including the current one. She has had 3 prior pregnancies and is currently pregnant, making her G4. Term (T): Number of term births (37 weeks or later). She has had two sets of twins delivered at 37 and 38 weeks, so T2. Preterm (P): Number of preterm births (between 20 and 36 weeks 6 days). She has one son born at 34 weeks, so P1. Abortions (A): Number of pregnancies ending in miscarriage or abortion before 20 weeks. She has no history of miscarriage or abortion, so A0. Living (L): Number of living children. She has two sets of twins (4 children) and her 9-year-old son (1 child), making a total of L5.
D. Gravidity (G): The total number of pregnancies, including the current one. She has had 3 prior pregnancies and is currently pregnant, making her G4. Term (T): Number of term births (37 weeks or later). She has had two sets of twins delivered at 37 and 38 weeks, so T2. Preterm (P): Number of preterm births (between 20 and 36 weeks 6 days). She has one son born at 34 weeks, so P1. Abortions (A): Number of pregnancies ending in miscarriage or abortion before 20 weeks. She has no history of miscarriage or abortion, so A0. Living (L): Number of living children. She has two sets of twins (4 children) and her 9-year-old son (1 child), making a total of L5.