arm is hot; pinkish red in color; hurts to move; arm is swollen; round circumference with an inch and a half in size/like size of a baseball; Night sweats; tiredness; pressure headache; hard to move; Painful arm; Patient pregnant; This spontaneous prospective pregnancy case was reported by a consumer and describes the occurrence of HYPOKINESIA (hard to move), NIGHT SWEATS (Night sweats), VACCINATION SITE WARMTH (arm is hot), VACCINATION SITE ERYTHEMA (pinkish red in color) and VACCINATION SITE MOVEMENT IMPAIRMENT (hurts to move) in a 30-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 037F21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.    On 18-Sep-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. Last menstrual period and estimated date of delivery were not provided. On 18-Sep-2021, the patient experienced HYPOKINESIA (hard to move), VACCINATION SITE PAIN (Painful arm) and MATERNAL EXPOSURE DURING PREGNANCY (Patient pregnant). On 19-Sep-2021, the patient experienced NIGHT SWEATS (Night sweats) and HEADACHE (pressure headache). 19-Sep-2021, the patient experienced FATIGUE (tiredness). On 26-Sep-2021, the patient experienced VACCINATION SITE WARMTH (arm is hot) and VACCINATION SITE ERYTHEMA (pinkish red in color). 26-Sep-2021, the patient experienced VACCINATION SITE MOVEMENT IMPAIRMENT (hurts to move), VACCINATION SITE SWELLING (arm is swollen) and VACCINATION SITE INDURATION (round circumference with an inch and a half in size/like size of a baseball). The patient was treated with IBUPROFEN at an unspecified dose and frequency. On 18-Sep-2021, MATERNAL EXPOSURE DURING PREGNANCY (Patient pregnant) had resolved. On 21-Sep-2021, HYPOKINESIA (hard to move) and VACCINATION SITE PAIN (Painful arm) had resolved. At the time of the report, NIGHT SWEATS (Night sweats), VACCINATION SITE WARMTH (arm is hot), VACCINATION SITE ERYTHEMA (pinkish red in color), VACCINATION SITE MOVEMENT IMPAIRMENT (hurts to move), FATIGUE (tiredness), HEADACHE (pressure headache), VACCINATION SITE SWELLING (arm is swollen) and VACCINATION SITE INDURATION (round circumference with an inch and a half in size/like size of a baseball) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       No concomitant product reported by the reporter.  This case concerns a 30 year-old, female patient with no relevant medical history, who experienced the non serious unexpected events of Maternal exposure during pregnancy, vaccination site warmth, Vaccination site movement impairment and Night sweats. The events occurred approximately one to eight days after the first dose of Spikevax. The rechallenge was unknown since the event occurred after the first dose and no information has been provided regarding second dose. The benefit-risk relationship of Spikevax is not affected by this report.; Sender's Comments: This case concerns a 30 year-old, female patient with no relevant medical history, who experienced the non serious unexpected events of Maternal exposure during pregnancy, vaccination site warmth, Vaccination site movement impairment and Night sweats. The events occurred approximately one to eight days after the first dose of Spikevax. The rechallenge was unknown since the event occurred after the first dose and no information has been provided regarding second dose. The benefit-risk relationship of Spikevax is not affected by this report.