This is due to its high vitamin and mineral content, which helps balance hormones and strengthens the walls of uterus and the general pelvic area. (wellnessmama.com)
Each puppy has a placenta which in uterus provided its nourishment from the dam. (breedingbusiness.com)
The overall goal is to support a healthy normal functioning uterus for a lifetime! (natural-fertility-info.com)