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.
Four: Thatâs how many pounds of probiotics (aka good bacteria, yeast, and mold) you have hanging out in your GI tract right now. Trillions of microbes-strong, these guys are a huge part of your health. According to one review in Microbial Cell Factories, probiotic cells in the gut outnumber human cells 10 to 1.