After spending approximately 40 weeks inside the womb, the average newborn weighs 7 1/2 pounds. Most babies weigh between 5 1/2 and 10 pounds. The average length of a newborn is 20 inches (50 centimeters), with a range of 18 to 22 inches. The average head circumference (the distance around the head) is 14 inches (35 centimeters).
Lactobacillus and Bifidobacterium are the most common probiotic bacteria. The Lactobacillus genus has 18 different bacteria strains, while the Bifidobacterium genus consists of eight strains.
Many types of bacteria are classified as probiotics. They all have different benefits, but most come from two groups. Ask your doctor about which might best benefit you. Lactobacillus. This may be the most common probiotic. Itâs the one youâll find in yogurt and other fermented foods.