Single parent
In the United States, 83% of single parents are mothers. Among this percentage of single mothers: 45% of single mothers are currently divorced or separated, 1.7% are widowed, 34% of single mothers never have been married. Although decades ago, having a child outside of marriage and/or being a single mother was not prominent. Census information from 1960 tells us that in that year, only nine percent of children lived in single parent families. Today four out of every ten children are born to an unwed mother.
Maternal mortality ratio
The maternal mortality ratio is a key performance indicator for efforts to improve the health and safety of mothers before, during, and after childbirth per country worldwide. Often referred to as MMR, it is the annual number of female deaths per 100,000 live births from any cause related to or aggravated by pregnancy or its management (excluding accidental or incidental causes). It is not to be confused with the maternal mortality rate, which is the number of maternal deaths (direct and indirect) in a given period per 100,000 women of reproductive age during the same time period. The statistics are gathered by WHO, UNICEF, UNFPA, World Bank Group, and the United Nations Population Division. The yearly report started in 1990 and is called "Trends in Maternal Mortality". As of the 2015 data published in 2016, the countries that have seen an increase in the maternal mortality ratio since 1990 are the Bahamas, Georgia, Guyana, Jamaica, Dem. People’s Rep. Korea, Serbia, South Africa, St. Lucia, Suriname, Tonga, United States, Venezuela, RB Zimbabwe. But according to Sustainable Development Goals report 2018, the overall maternal mortality ratio has declined by 37 percent since 2002. Nearly 303,000 women died due to complications during pregnancy.