Women who take the Pill each day have a key brain region which is smaller, experts have found for the first time.
The hypothalamus is crucial for the normal production of hormones and plays a role in mood, appetite, sex drive and sleep.
(The hypothalamus is also responsible for parental behaviour, see here: And cells signaling to a hormone-regulating region of the brain's hypothalamus appear to modulate the parenting-related hormones oxytocin, vasopressin, and the stress hormone corticotropin-releasing hormone. It's probably the reason why modern women are so non-maternal).
Researchers at Montefiore Medical Center in New York City scanned the brains of 50 women to make the conclusion.
They saw a 'dramatic difference' in the size of the hypothalamus in women who took birth control pills.
But don't you worry, despite the crucial area of your brain shrinking 6%, it totally won't affect you:
But they said cognitive performance or behaviour did not change - despite the brain region being around six per cent smaller.
Well, except you getting depressed and dealing with anger issues, that is:
However, other preliminary evidence from the same team found a link between the smaller size and anger and depressive symptoms.
Probably other things, too:
Disease of the hypothalamus, most often caused by brain injury, surgery, tumours or genetic disorders, can cause insomnia, dehydration and infertility.
A feature or a bug? You decide!