Refractory period (sex) autonomic feedback mechanism, rather than through central chemicals like oxytocin, serotonin, and prolactin. Autonomic feedback is already known to regulate other physiologic systems, such as breathing, blood pressure, and gut motility. This theory suggests that after male ejaculation, decreased wall tension in structures such as the seminal vesicles leads to a change in the fine autonomic signals sent from these organs, effectively creating a negative feedback loop. Such a mechanism is similar to decreased gastric and bowel motility once gastric contents have passed through. Once the feedback loop has been created, the refractory period remains until the loop is broken
Milk substitute are often coconut milk or plant cream, due to the higher fat and lower water content preventing the formation of ice crystals. Breast milk substitutes are available for infants if breast feeding is not an option. Infant formulas based on cow’s milk, soy or rice can be a supplement to breast milk or a sole source of nutrition before solid food is introduced. Infant formula is usually fortified with dietary nutrients optimised for babies and toddlers, such as iron, to ensure survival, growth and health of the baby. Milk substitute A milk substitute (or, more precisely, an analogue of mammalian