There's a lot of errors in this: for example, in step 4, the hypothalamus actually detects the rising estrogen levels in the blood stream and signals the pitui

There's a lot of errors in this: for example, in step 4, the hypothalamus actually detects the rising estrogen levels in the blood stream and signals the pituitary which in turn signals the testes to stop testosterone production. (Testosterone gets converted to estrogen)