F75-34024-08182 · OpenVSafe

Timeline

Registration Vaccinations Survey responses Call reports Cases without a report Call attempts Call successful Pregnancy survey

2021-04-02
Dose 1 — Moderna
2021-04-30
Registered in v-safe
2021-04-30
Dose 2 — Moderna
2021-05-02
Survey response — days 1–6 daily, dose 2
MedDRA: Amenorrhoea — Feeling: Fair · Site: Pain · Fever · Headache, Joint pains, Muscle or body aches, Fatigue or tiredness

Free text: I have not had my period since receiving my first dose of the vaccine. The first day of my last period was March 20. I am not pregnant, and my cycles are generally regular to slightly frequent.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-03
Survey response — days 1–6 daily, dose 2
MedDRA: Menstruation delayed — Feeling: Good

Free text: My menstrual period is late. I am not pregnant or on any medication that might influence my cycle. The first day of my last period was 3/20/2021. I received my 1st dose of the Moderna vaccine on 4/02 and my 2nd dose on 4/30.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-04
Survey response — days 1–6 daily, dose 2
MedDRA: Oligomenorrhoea — Feeling: Good

Free text: Contributed delay in my menstrual cycle. 1st day of my last period was 3/20/2021

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-05
Survey response — days 1–6 daily, dose 2
MedDRA: Menstrual disorder, Menstruation delayed, Pregnancy — Feeling: Good

Free text: Continued delay in menstrual cycle. My last period was 3/20/2021. I am not pregnant or taking any medication that would interfere with my cycle.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-14
Health check-in — day 14, dose 2
Feeling: Good

Adult check-in
2021-05-28
Health check-in — day 28, dose 2
Feeling: Good

Adult check-in

Vaccinations

Dose	Date	Manufacturer	Co-administered
1	2021-04-02	Moderna
2	2021-04-30	Moderna

Free text

Release 8 — days 1–6 daily, dose 2

2021-05-02

Systemic reaction (other): I have not had my period since receiving my first dose of the vaccine. The first day of my last period was March 20. I am not pregnant, and my cycles are generally regular to slightly frequent.

2021-05-03

Systemic reaction (other): My menstrual period is late. I am not pregnant or on any medication that might influence my cycle. The first day of my last period was 3/20/2021. I received my 1st dose of the Moderna vaccine on 4/02 and my 2nd dose on 4/30.

2021-05-04

Systemic reaction (other): Contributed delay in my menstrual cycle. 1st day of my last period was 3/20/2021

2021-05-05

Systemic reaction (other): Continued delay in menstrual cycle. My last period was 3/20/2021. I am not pregnant or taking any medication that would interfere with my cycle.

Each entry is dated by the survey it was written in (the CDC re-sent the releases with survey dates in 2025); click a date to see that survey response. The CDC cut some text off at about 250 characters: symptoms in every release, and the other two fields in releases 9-12. Those entries are marked "cut off by CDC".

MedDRA terms by release

Field	Preferred term	2021-09	2023-04	2024-11
SRO	Amenorrhoea	✓	✓	✓
SRO	Menstrual disorder	✓	✓	○
SRO	Menstruation delayed	✓	✓	✓
SRO	Oligomenorrhoea	✓	✓	✓
SRO	Pregnancy	✓	✓	○

✓ active code · ○ coded but marked inactive · blank = not in that release