This is according to the latest figures to be released by the US National Center for Health Statistics, which has collected the data from 99 percent of all birth certificates registered in the country during 2017. By comparison, there were about 21 births per 1,000 residents in 1990.
The birth rate in the USA has been steadily declining over recent years, but the drop between 2016 and 2017 was the greatest yet seen, with 92,000 fewer births.
Fertility has fallen the most for the youngest women since 2007, but in the a year ago, declines were also registered for women in their 30s as well.
This is thought to be down to a number of different factors. Data for 2017 were compared with 2016 data and earlier years.
The numbers seem to correspond with what the Census Bureau and others have been predicting for years: that America's population growth will increasingly depend on immigrants, after decades in which the US enjoyed a relatively high fertility rate when compared to other developed countries. The only group to see birth rates rise was women in their early 40s-the birth rate for teenagers was down a whopping 7%, meaning the teen birthrate is now down 55% from 2007. That figure is for women from 15-19 years old.
The overall trend in declining birth rates is, however, not unexpected for the United States, as many developed nations see this downturn.
Birth rates fell by 4 percent both for women from 20-24 years old and for women of ages 25-29.
However, the birth rate actually went up a bit for women aged 40 to 44, the report found.
Low birth weight - defined as newborns that weigh less than 5 lb. There were increases in the cesarean delivery rate and in the low-risk cesarean delivery rate to 32.0 and 26.0 percent, respectively, in 2017. 8 oz. - rose slightly above the highest level previously recorded, with 2017's 8.27 percent topping 2006's 8.26 percent.