Vital sign	Normal range
Heart rate	120 to 160 beats per minute*
Respiratory rate	40 to 60 breaths per minute
Systolic blood pressure	60 to 90 mm Hg†
Temperature	97.7°F to 99.5°F (36.5°C to 37.5°C)‡
Weight	Females: 3.5 kg (7 lb, 12 oz); range, 2.8 to 4.0 kg (6 lb, 3 oz to 8 lb, 14 oz)
	Males: 3.6 kg (8 lb); range, 2.9 to 4.2 kg (6 lb, 7 oz to 9 lb, 5 oz)
Length	20 in (51 cm); range, 19 to 21 in (48 to 53 cm)
Head circumference	14 in (35 cm); range, 13 to 15 in (33 to 37 cm)