Tuataras are an ancient breed of reptiles, who can live an average of 60 years, though a lifespan of over 100 years old is not unknown. Thus is the case of "Henry," a tuatara aged 111, who just became a first-time father.

Not all of the 1 million Tajik men who've gone abroad for work left behind wives and young children. But many did, and struggling families are finding that the direct and indirect costs of such migrant lifestyles are higher than they imagined.

Researchers are now saying that for men to increase their risk of fertility, they should make sure they are getting a high intake level of folic acid.

Researchers have found that strong child support enforcement has mixed outcomes for unmarried parent families.