Love, marriage, and a baby carriage

In honor of St. Valentine...(an update of last year's popular post "Love and Marriage" )

Some startling observations about love and marriage in the U.S.:

• Marriages are lasting longer
• People are getting married older but "sooner"
• Condom sales are highest in February
• Home pregnancy test kit sales are highest in March

FIRST COMES LOVE, THEN COMES MARRIAGE...

According to recent news, the longest-married couple in the United States tied the knot 82 years ago.

Valentine image source

While this may be an unusual feat, marriage duration has (on average) increased in recent years. 80 percent of marriages last at least 5 years, and 68 percent last 10 years or more, according to data compiled by the U.S. Centers for Disease Control and Prevention based on the National Survey of Family Growth (2006-2010). This is an increase from the 2002 survey, in which 78 percent of marriages last at least 5 years and two thirds last 10 years or more.

While average age at first marriage has been increasing, divorce rates have also fallen, from 4 divorces per 1,000 population in 2000 to 3.6 per 1,000 in 2011. Divorce rates peaked in the years changes in divorce laws that occurred in the mid 1970s, but then leveled off and fell slightly. Some of this trend can be attributed to lower marriage rates (fewer marriages lead to fewer divorces), but some is likely a result of people waiting longer to get married in the first place.

But perhaps most interesting is new analysis by the U.S. Census Bureau which shows that while age at first marriage has risen, life expectancy has increased more rapidly, so people are getting married "sooner" even though they get married older.

Source: U.S. Census Bureau

...THEN COMES... A BABY CARRIAGE?

According to many news sources, condom sales are highest in February (in the US and in India, for example). However, a National Institutes of Health study shows that increased condom sales do not necessarily translate to increased condom usage, which might explain the next phenomenon...

Nielsen research notes that sales of home pregnancy tests are higher March than any other time of the year:

Perhaps as a result of Valentine’s Day romance, more pregnancy and infertility test kits are sold approximately six weeks after Valentine’s Day than at any other time of the year. Consumers spend more than $15 million*on pregnancy and infertility test kits during the second, third and fourth weeks of March, with the third week of March ranking number one** in sales.
Notes: *Three weeks ending March 24, 2007 showed total sales of $15.4 million for pregnancy and infertility test kits in U.S. food, drug and mass merchandiser stores, including Wal-Mart. **One week ending March 24, 2007 showed total sales of $5.2 million for pregnancy and infertility test kits in U.S. food, drug and mass merchandiser stores, including Wal-Mart.

Despite the sales data, births are actually highest in late summer and early autumn, as a result of pregnancies in late autumn and early winter of the prior calendar year. This trend, known as a "seasonal cycle in fecundability" is well documented in the scientific literature.