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. 2022 Jan 6;6(1):e33792. doi: 10.2196/33792

Table 2.

Self-reported pregnancy outcomes for Twitter users who received COVID-19 vaccination during pregnancy or the periconception period (N=45).

Self-reported outcome Outcomes, n (%)a Sample tweet
Adverse outcomes

Neonatal intensive care unit (NICU) 5 (11) I made a small human. So that’s pretty cool. Now for a few weeks of NICU time.

Preterm birth (<37 weeks) 4 (9) She was born Jan. 11th...3 months early...stayed in the hospital until about 2.5 weeks ago...

Low birth weight (<5 pounds, 8 ounces) 1 (2) He weighed 3 lbs 9 ounces @ birth & we didn’t have 1 thing that came close to fitting him.

Miscarriage 1 (2) In the last 4 weeks, I’ve had a miscarriage...family death...pet death...my car broke down...finals...

Stillbirth 0 (0) N/Ab

Birth defect 0 (0) N/A
Normal outcomes

Term (≥37 weeks)c 39 (87) He made his debut at #37weeks. We got to the hospital by 6:15am, fully dilated by 7:45am, and he was here at 8:22am!

Normal birth weight (≥5 pounds, 8 ounces) 7 (16) He arrived via c/section last night at 8:49pm. He was 7 lbs 11 oz. I can’t believe he’s mine!

aMultiple outcomes were identified for some pregnancies; therefore, the sum and percentage of the total outcomes are greater than 45 and 100%, respectively.

bN/A: not applicable.

cPregnancies were included for which we did not find subsequent tweets explicitly indicating live birth.