Hormones
Neuroendocrine cells are like nerve cells, but they also make hormone like cells of the endocrine system. They receive messages from the nervous system and respond by making and releasing hormones. These hormones control many bodily functions.
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All of them except condoms. Everything you take orally gives you hormones such as progesterone and estrogen to fool your body into thinking you’re pregnant so you won’t produce an egg that month. Other methods such as the ring and patch do the same, just not through direct ingestion.
You can keep them health by vitamins C,D,and K and calcium
A it varies from state to state