Sperm donation for fertility issues has been common for some time and ovum donation has become increasingly accepted by women as well.

That leads to sociological questions about selection; everyone says they will love their kids no matter what, but given a book to choose from, what traits in a donor do people consider most important, beauty, intelligence or health?

Some children are allergic to milk, so they drink milk substitutes such as soy or rice. And almond milk has become a well-marketed fad to due health claims.

But there may be negatives: though many of those products are fortified, children who drink them have lower levels of Vitamin D in their blood than those who drink cow's milk, according to a paper in the Canadian Medical Association Journal. 

Even depressed people are essentially optimistic - they believe that tomorrow will be better, even though that belief probably won't lead to better outcomes. That is true optimism.

A paper in Clinical Psychological Science says that middle-aged adults who had a history of depression evaluated their past and current lives in more negative terms than adults without depression - but the future was just as rosy in both groups.

Eliminating subsidies that help low- and moderate-income people purchase coverage through government-run health insurance marketplaces would sharply boost costs for consumers and cause more than 11 million Americans to lose their health insurance, according to a new paper by the section of the RAND Corporation devoted to nationalizing health care.

A paper presented at the annual congress of the European College of Neuropsychopharmacology (ECNP) in Berlin says that moderate cannabis use by adolescents does not lead to educational or intellectual decline, but that heavy cannabis use is associated with slightly poorer exam results at age 16.

Some people suffer from 'winter blues' while others have no issue.

Seasonal Affective Disorder (SAD)
affects people as daylight levels drop in autumn. At Northern European latitudes (for example all of Scandinavia, Glasgow and Moscow) around 1 person in 6 suffers from SAD. 

Psychologists have searched for reasons why. A small longitudinal study concluded that people with Seasonal Affective Disorder show significant seasonal differences in the way they regulate the neurotransmitter serotonin in comparison to the majority of the population.