Winter sex is more likely to produce naturally skinny individuals who never have to worry about their weight, a study suggests.
On the other hand, babies conceived in the heat of summer may face a life-long struggle to stay slim.
Scientists have linked cold weather conception to larger amounts of calorie-burning brown fat in both mice and humans.
Only small amounts of brown fat are found in human adults, mainly under the tongue, around the collar bone and along the spine.
But people who have more than their fair share of the precious tissue can count themselves lucky.
Unlike white fat, which contributes to heart disease, cancer and diabetes, brown fat is widely seen as beneficial. It burns up…