2 National Vital Statistics Reports, Vol. 71, No. 4, August 4, 2022
For deaths occurring at 28 weeks of gestation or more, the rate in
2020 (2.78) was not significantly different from 2019 (2.73). In
2020, the fetal mortality rate was highest for non-Hispanic Native
Hawaiian or Other Pacific Islander (10.59) and non-Hispanic
Black (10.34) women and lowest for non-Hispanic Asian
women (3.93). Fetal mortality rates were highest for females
under 15 and aged 45 and over, for women who smoked during
pregnancy, and for women with multiple gestation pregnancies.
Five selected causes accounted for 89.6% of fetal deaths in the
43-state and District of Columbia reporting area.
Keywords: fetal death • stillbirth • pregnancy loss • National
Vital Statistics System
Introduction
Fetal mortality—the intrauterine death of a fetus at any
gestational age—is a major but often overlooked public health
issue. Much of the public concern surrounding reproductive loss
has focused on infant mortality, due in part to lesser knowledge
of the incidence, etiology, and prevention strategies for fetal
mortality. This report presents detailed data on numbers and
rates of fetal deaths for the United States for 2020. Data are
presented by maternal race and Hispanic origin, age, tobacco use
during pregnancy, and state of residence, as well as by plurality,
sex, gestational age at delivery, birthweight, and selected causes
of death. Trends in fetal mortality are also examined.
In addition to the tabulations included in this report, more
detailed analysis of fetal mortality is possible by using the annual
fetal death public-use file. The data file may be downloaded from:
https://www.cdc.gov/nchs/data_access/Vitalstatsonline.htm.
The public-use file does not include geographic detail; a file with
this information may be available upon special request (see the
Division of Vital Statistics data release policy: https://www.cdc.
gov/nchs/nvss/dvs_data_release.htm). Fetal death data may also
be accessed via the Centers for Disease Control and Prevention’s
(CDC) Wide-ranging Online Data for Epidemiologic Research
(WONDER). WONDER is a web-based data query system that
makes CDC data available to public health professionals and the
public (1).
Methods
Data sources
Data in this report are drawn from two National Center
for Health Statistics (NCHS) vital statistics data files: the 2020
fetal death data set (for fetal deaths) and the 2020 birth data set
(for births). The 2020 fetal death data set contains information
from all reports of fetal death filed in the 50 states, the District
of Columbia, Guam, and Puerto Rico (American Samoa did not
report data for 2020, and data for the Northern Marianas and
U.S. Virgin Islands were excluded to protect confidentiality due
to the small number of events reported) (2). The 2020 birth data
set contains information from all Certificates of Live Birth filed
in the 50 states, the District of Columbia, Guam, the Northern
Marianas, Puerto Rico, and the Virgin Islands (American Samoa
did not report data for 2020). Tables showing data by jurisdiction
also provide separate information for Guam and Puerto Rico;
however, these data are not included in U.S. totals.
Fetal mortality
Fetal death refers to the intrauterine death of a fetus
prior to delivery (Technical Notes). Fetal mortality is generally
divided into three periods based on gestational age: less than
20 completed weeks of gestation, 20–27 weeks of gestation
(early fetal deaths), and 28 weeks of gestation or more (late fetal
deaths). Although the vast majority of fetal deaths occur early
in pregnancy, most states in the United States only require the
reporting of fetal deaths at 20 weeks of gestation or more (2),
and fetal mortality data from the National Vital Statistics System
are usually presented for fetal deaths at 20 weeks of gestation
or more. Therefore, only fetal deaths reported at 20 weeks of
gestation or more are included in this report. Numbers and rates
for early and late fetal deaths are shown separately for selected
variables. Statistics on fetal death exclude data for induced
terminations of pregnancy. Fetal mortality rates in this report are
computed as the number of fetal deaths at 20 weeks of gestation
or more per 1,000 live births and fetal deaths at 20 weeks or
more (Technical Notes).
Data limitations
Variation exists among states in reporting requirements
and possibly in completeness of reporting of fetal death data,
and these variations can have implications for data quality and
completeness (Technical Notes). Correct interpretation of fetal
death data should include an evaluation of the completeness
of reporting of fetal deaths, as well as an evaluation of the
completeness of reporting for the specific variables of interest
(3–5). The percentage of not-stated responses for fetal death
data varies markedly among variables and states; see “User
Guide to the 2020 Fetal Death Public Use File”(2).
2003 revision of U.S. Standard Report of Fetal
Death
Starting in 2018, all 50 states, the District of Columbia,
Guam, the Northern Marianas, Puerto Rico, and the Virgin
Islands reported data based on the 2003 U.S. Standard Report
of Fetal Death.
With the implementation of the 2003 revision, two
worksheets, the Patient’s Worksheet (6) and the Facility
Worksheet (7), were developed to encourage collection of data
from the best sources. For the Patient’s Worksheet, data are
directly obtained from the mother and include items such as
mother’s date of birth, race, Hispanic origin, level of education,
tobacco use during pregnancy, and place of residence. For the
Facility Worksheet, data are obtained from the medical records
of the mother for items such as prenatal care, medical risk
factors, maternal morbidity, plurality, sex of fetus, gestational
age, birthweight, and cause of death. Detailed definitions for data
items that are collected from the Facility Worksheet are in the
“Guide to the Facility Worksheet” (8).