
Ovulation is beneficial because it’s how women make hormones.
Every month, as the ovaries get ready to release an egg, they pump out estrogen. Estrogen, in turn, stimulates serotonin, which is why women can be more outgoing and energetic in the few days leading up to ovulation.
Every month, after ovulation, one of the ovaries releases a huge amount of progesterone—the calming, soothing, anti-inflammatory hormone.

Our stress response system—the HPA axis—is calibrated for intermittent, severe threats such as lions. Not for the incessant, trivial threats of modern life, such as difficult phone calls. We don’t want our hypothalamus-pituitary-adrenal axis to charge up and release cortisol every time we drive in heavy traffic, but it will do so.
Thyroid-stimulating hormone (TSH) was supposed to be a simple way to detect thyroid disease. Before its invention in the 1970s, doctors diagnosed thyroid disease by symptoms.