Review Question - QID 109277

A 15-day-old girl presents to the pediatrician for a well visit. Her mother reports that she has been exclusively breastfeeding since birth. The patient feeds on demand every 1 to 2 hours for 10-15 minutes on each breast. The patient’s mother reports that about 2 times per day, the patient sleeps for a longer stretch of about 3 hours and she wonders whether she should be waking the patient up to feed at those times. She also reports that she sometimes feels that her breasts are not completely empty after feeding. The patient voids 4-5 times per day and stools 2-3 times per day. Her mother occasionally saw red streaks in the patient’s diaper during the first week of life. The patient was born at 39 weeks of gestation via vaginal delivery and her birth weight was 2787 g (6 lb 2 oz, 16th percentile). One week ago, the patient weighed 2588 g (5 lb 11 oz, 8th percentile) and today the patient weighs 2720 g (6 lb, 8th percentile). Her temperature is 98.7°F (37.1°C), blood pressure is 52/41 mmHg, pulse is 177/min, and respirations are 32/min. She has normal cardiac sounds, her abdomen is soft, non-tender, and non-distended. Which of the following is the most appropriate next step in management?