The nurse is performing an assessment on a client who thinks she may be experiencing preterm labor. Which information is most important for the nurse to understand and share with the client?

Preterm labor occurs when the cervix remains closed.

A woman with symptoms can wait several days before contacting the primary caregiver.

The client can ambulate for 2 hours.

Diagnosis of preterm labor is based on gestational age, uterine activity, and progressive cervical change.