The 230,537 births recorded in Spain in the first half of 2011 represents a decline of 1.1 percent from the same period of the previous year and continues a trend that began in 2009, the National Statistics Institute, or INE, said Wednesday.
The median number of children per woman remained stable at 1.38 and the median age of first-time mothers was 31.3.
Life expectancy reached 78.8 years for men and 84.8 years for women in the first half of last year, while the number of live births per 1,000 inhabitants fell to 10.46, its lowest level since 2002.
INE data also showed a slight increase in mortality between 2010 and 2011, from 8.25 deaths per 1,000 people to 8.4 deaths.
The number of marriages fell 5.7 percent in the first half of 2011 to 69,864, of which 2.5 percent were same-sex unions, the INE said.
Spain, a nation of more than 47 million people, has been mired in economic woes since the 2008 global financial meltdown and the unemployment rate stands at more than 22 percent.