It's true that men are more likely to lose their hair than women, mostly due to male pattern baldness (more on that later). But thinning hair and hair loss are also common in women, and no less demoralizing.
Here are some common and not-so-common reasons why you might be seeing less hair on your head.
President Obama's national security team prepared to make its case to Congress on Tuesday for a military strike on Syria, as the president continued to woo powerful lawmakers to help in his effort to win congressional support for an attack.
Israel has acknowledged conducting a joint missile test with the United States in the Mediterranean Sea on Tuesday, responding to reports that Russian radar had detected a missile launch in the direction of the eastern Mediterranean.