A nurse is caring for a client in the emergency department who is in active labor on December 26. The client reports their last menstrual period was around April 1. Which of the following ages is the anticipated gestational age of the fetus?

Step 1 is to determine the number of days from April 1 to December 26. Days in April = 30 - 1 + 1 = 30 days. Days in May = 31 days. Days in June = 30 days. Days in July = 31 days. Days in August = 31 days. Days in September = 30 days. Days in October = 31 days. Days in November = 30 days. Days in December = 26 days. Total number of days = 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 26 = 270 days. Step 2 is to convert the total number of days into weeks. 270 days ÷ 7 days/week = 38.57 weeks. Step 3 is to round to the nearest whole week. The anticipated gestational age is 39 weeks.