What indicates effective administration of oxytocin in a client at 41 weeks gestation?

When administering oxytocin to a client at 41 weeks gestation, effective administration is indicated by the occurrence of contractions that are consistent and appropriate for labor progression. The correct choice reflects that contractions occur every 90 seconds, which signifies that the uterus is responding well to the hormone.

Oxytocin is a potent uterine stimulant and is utilized to promote and enhance contractions during labor. The target is often to achieve regular, rhythmic contractions that facilitate cervical dilation and aid in the progression of labor. Contractions every 90 seconds indicate that the client is likely in active labor, with the contractions being sufficiently frequent to support this phase of childbirth.

In contrast, other choices suggest less effective scenarios: contractions every 15 minutes are too infrequent for active labor; no contractions at all suggest that oxytocin is not having the desired effect; and having ruptured membranes without contractions indicates that labor has not effectively initiated. Therefore, the choice of contractions occurring every 90 seconds indicates the intended and successful response to the oxytocin administration.