TABLE 8. Percentages of preterm (<37 weeks) infants among infants born with use of assisted reproductive technology* and all U.S. infants, by plurality and female patient’s reporting area of residence† at time of treatment — United States and Puerto Rico, 2016.
| Patient’s reporting area of residence | ART singleton infants (%) | All singleton infants§ (%) | ART twin infants¶ (%) | All twin infants§ (%) | ART triplets and higher-order infants¶ (%) | All triplets and higher-order infants§ (%) |
|---|---|---|---|---|---|---|
| Alabama |
19.1 |
9.4 |
70.9 |
64.5 |
—** |
100.0 |
| Alaska |
11.1 |
7.2 |
56.8 |
50.3 |
—§§ |
—** |
| Arizona |
13.5 |
7.2 |
65.2 |
58.0 |
100.0 |
100.0 |
| Arkansas |
11.3 |
8.9 |
79.5 |
66.5 |
—§§ |
100.0 |
| California |
12.7 |
6.8 |
59.9 |
55.8 |
100.0 |
99.5 |
| Colorado |
15.2 |
7.0 |
71.0 |
58.1 |
—** |
95.6 |
| Connecticut |
12.6 |
7.0 |
58.4 |
53.5 |
100.0 |
100.0 |
| Delaware |
10.7 |
8.2 |
84.2 |
61.2 |
—§§ |
—** |
| District of Columbia |
10.6 |
8.6 |
65.4 |
54.9 |
—**,†† |
—** |
| Florida |
13.9 |
8.2 |
64.1 |
59.7 |
100.0 |
95.9 |
| Georgia |
14.0 |
9.0 |
68.0 |
63.4 |
—** |
98.0 |
| Hawaii |
17.9 |
8.2 |
63.9 |
65.9 |
—** |
97.1 |
| Idaho |
15.2 |
7.0 |
74.8 |
57.9 |
—** |
89.3 |
| Illinois |
13.5 |
8.0 |
60.1 |
60.2 |
93.9 |
97.6 |
| Indiana |
15.1 |
7.8 |
58.0 |
60.8 |
—** |
94.7 |
| Iowa |
13.5 |
7.1 |
59.4 |
63.0 |
—** |
98.0 |
| Kansas |
16.4 |
7.2 |
64.0 |
60.0 |
—** |
100.0 |
| Kentucky |
15.0 |
8.9 |
67.9 |
66.5 |
—** |
100.0 |
| Louisiana |
15.9 |
10.1 |
69.2 |
70.1 |
—** |
100.0 |
| Maine |
8.8 |
6.8 |
52.4 |
55.5 |
—**,†† |
—** |
| Maryland |
13.7 |
7.9 |
63.3 |
61.6 |
—** |
100.0 |
| Massachusetts |
12.2 |
6.5 |
61.8 |
56.7 |
—** |
96.7 |
| Michigan |
13.4 |
7.8 |
65.9 |
60.3 |
100.0 |
97.8 |
| Minnesota |
11.9 |
6.7 |
66.8 |
58.5 |
—** |
100.0 |
| Mississippi |
14.0 |
11.3 |
70.1 |
70.3 |
—**,†† |
91.7 |
| Missouri |
15.3 |
7.9 |
73.7 |
61.0 |
—** |
98.9 |
| Montana |
11.4 |
7.0 |
71.9 |
56.5 |
—§§ |
—** |
| Nebraska |
17.5 |
7.6 |
64.3 |
55.3 |
—§§ |
89.6 |
| Nevada |
14.3 |
8.3 |
75.1 |
63.8 |
—**,†† |
100.0 |
| New Hampshire |
9.8 |
6.1 |
51.6 |
54.4 |
—**,†† |
95.2 |
| New Jersey |
13.9 |
7.5 |
65.4 |
59.5 |
100.0 |
100.0 |
| New Mexico |
19.0 |
8.3 |
77.8 |
63.9 |
—**,†† |
—** |
| New York |
12.5 |
6.8 |
57.9 |
55.2 |
82.5 |
97.3 |
| North Carolina |
13.5 |
8.2 |
60.0 |
59.8 |
100.0 |
97.6 |
| North Dakota |
17.5 |
6.9 |
67.6 |
66.5 |
—**,†† |
—** |
| Ohio |
12.4 |
8.2 |
63.8 |
59.3 |
100.0 |
100.0 |
| Oklahoma |
16.6 |
8.6 |
67.1 |
62.8 |
—** |
97.3 |
| Oregon |
10.7 |
6.1 |
56.7 |
54.4 |
—** |
100.0 |
| Pennsylvania |
12.6 |
7.3 |
57.7 |
56.9 |
—** |
99.1 |
| Puerto Rico |
10.9 |
12.9 |
65.7 |
66.0 |
—§§ |
—** |
| Rhode Island |
14.5 |
6.9 |
69.7 |
61.6 |
—**,†† |
—** |
| South Carolina |
14.3 |
8.8 |
66.2 |
62.8 |
100.0 |
96.1 |
| South Dakota |
9.7 |
6.9 |
43.3 |
53.8 |
—** |
100.0 |
| Tennessee |
19.8 |
9.0 |
73.6 |
65.2 |
—** |
100.0 |
| Texas |
17.0 |
8.3 |
74.2 |
63.0 |
94.1 |
96.5 |
| Utah |
18.1 |
7.1 |
67.1 |
64.3 |
—** |
100.0 |
| Vermont |
12.7 |
6.5 |
66.7 |
44.3 |
—**,†† |
—** |
| Virginia |
13.0 |
7.4 |
61.2 |
59.7 |
—** |
100.0 |
| Washington |
11.8 |
6.4 |
67.7 |
56.8 |
100.0 |
98.4 |
| West Virginia |
27.2 |
9.9 |
73.9 |
62.1 |
—**,†† |
100.0 |
| Wisconsin |
12.5 |
7.5 |
60.3 |
60.9 |
—**,†† |
96.3 |
| Wyoming |
17.1 |
7.5 |
63.2 |
63.8 |
—§§ |
—** |
| Total | 13.7 | 7.8 | 64.2 | 59.9 | 97.0 | 97.7 |
Abbreviation: ART = assisted reproductive technology.
* ART totals include infants conceived from ART procedures performed in 2015 and born in 2016 and infants conceived from ART procedures performed in 2016 and born in 2016. Total ART births exclude births to nonresidents and includes only infants with gestational age data available.
† In cases of missing residency data (0.4%), the patient’s residence was assigned as the location where the ART procedure was performed.
§ U.S. births include births to nonresidents. Source: Martin JA, Hamilton BE, Osterman MJ, Driscoll AK, Mathews TJ. Births: final data for 2016. Natl Vital Stat Rep 2018;67:1–55.
¶ Includes only the number of infants live born in a multiple-birth delivery. For example, if three infants were born in a live-birth delivery and one of the three infants was stillborn, the total number of live-born infants would be two. However, the two infants still would be counted as triplets.
** Estimates on the basis of N = <20 in the denominator have been suppressed because such rates are considered unstable.
†† To protect confidentiality, cells with values of 1–4 for ART infants and cells with values of 0–9 for all infants are suppressed. Also suppressed are data that can be used to derive suppressed cell values. These values are included in the totals.
§§ Estimates were not calculated because N = 0 for the denominator.