The beginnings of a brain first become apparent around four weeks after conception when the neural plate folds to form the neural tube
ADH is also called arginine vasopressin. It's a hormone made by the hypothalamus in the brain and stored in the posterior pituitary gland. It tells your kidneys how much water to conserve. ADH constantly regulates and balances the amount of water in your blood.
(My source was www.healthline.com in case you wanted to investigate for yourself. Hope this helps!)
