Sore arm; Body aches; Chills; Pregnant patient got expired booster shot; Maternal exposure during pregnancy; This spontaneous prospective pregnancy case was reported by a consumer and describes the occurrence of PAIN IN EXTREMITY (Sore arm), PAIN (Body aches), CHILLS (Chills), EXPIRED PRODUCT ADMINISTERED (Pregnant patient got expired booster shot) and MATERNAL EXPOSURE DURING PREGNANCY (Maternal exposure during pregnancy) in a 28-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination.     No relevant medical history was reported.  Concomitant products included PRENATAL VITAMINS [ASCORBIC ACID;BETACAROTENE;CALCIUM SULFATE;COLECALCIFEROL;CYANOCOBALAMIN;FERROUS FUMARATE;FOLIC ACID;NICOTINAMIDE;PYRIDOXINE HYDROCHLORIDE;RETINOL ACETATE;RIBOFLAVIN;THIAMINE MONONITRATE;TOCOPHERYL ACETATE;ZINC OXIDE] for an unknown indication.   On 28-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 30-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 29-Oct-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. The patient's last menstrual period was on an unknown date and the estimated date of delivery was 20-Mar-2022. On 29-Oct-2021, the patient experienced PAIN IN EXTREMITY (Sore arm), PAIN (Body aches), CHILLS (Chills), EXPIRED PRODUCT ADMINISTERED (Pregnant patient got expired booster shot) and MATERNAL EXPOSURE DURING PREGNANCY (Maternal exposure during pregnancy). In October 2021, PAIN IN EXTREMITY (Sore arm), PAIN (Body aches) and CHILLS (Chills) had resolved. On 29-Oct-2021, EXPIRED PRODUCT ADMINISTERED (Pregnant patient got expired booster shot) and MATERNAL EXPOSURE DURING PREGNANCY (Maternal exposure during pregnancy) had resolved.            No treatment medications were reported.  Company comment: This case concerns a 28 year old female with no relevant medical history reported, who experienced non-serious event of Maternal exposure during pregnancy which occurred with the 3rd dose of mRNA-1273 Vaccine ( Moderna Covid 19 Vaccine ) AOG at the time of exposure is unknown. . Another non-serious event is Expired Product administered which also occurred with the 3rd dose of the vaccine. The re-challenge for this case is not applicable. The benefit-risk relationship of mRNA-1273 vaccine ( Moderna Covid 19 vaccine ) is not affected by this report.   Most recent FOLLOW-UP information incorporated above includes: On 08-Nov-2021: Non significant follow up was received on 09-Nov-2021 On 10-Nov-2021: Significant follow-up received on 10-11-2021,  includes Reporter information, Patient demographics, Pregnancy details, Product details and new events; Sender's Comments: This case concerns a 28 year old female with no relevant medical history reported, who experienced non-serious event of Maternal exposure during pregnancy which occurred with the 3rd dose of mRNA-1273 Vaccine ( Moderna Covid 19 Vaccine ) AOG at the time of exposure is unknown. . Another non-serious event is Expired Product administered which also occurred with the 3rd dose of the vaccine. The re-challenge for this case is not applicable. The benefit-risk relationship of mRNA-1273 vaccine ( Moderna Covid 19 vaccine ) is not affected by this report.