In a previous study of 24 healthy women, vaginal microbiome composition became less diverse
between the second and third trimesters of pregnancy and just before delivery was enriched with Lactobacillus species, likely contributing to
vertical transmission of these bacteria during vaginal birth.21 In a study of 10 newborns in Venezuela, within hours of delivery, the intestinal tracts of infants born vaginally were colonized by Lactobacillus and Prevotella, whereas infants delivered operatively acquired bacteria present on the mother's skin and the hospital environment, such as Staphylococcus, Proprionibacterium, and Corynebacterium.15 Quiz Ref ID Our findings, based on a large group of 6 - week - old infants, indicated that Lactobacillus also contributes to the microbial environment of the gut but to a lesser
extent than Bifidobacteria, Bacteroides, and Streptococcus.
It was concluded that weightlifting technique (as measured by
vertical and horizontal displacement) was maintained constant to the greatest
extent when using 20 seconds of rest
between repetitions.