MedDRA preferred term · miscarriage

Abortion spontaneous: adverse event reports recording this term

39,602 reports to FDA record it, 2004–2026; 0.2% of the database.

Read first · FDA's statement on these data

Adverse event reports submitted to FDA do not undergo extensive validation or verification. Therefore, a causal relationship cannot be established between product and reactions listed in a report. While a suspected relationship may exist, it is not medically validated and should not be the sole source of information for clinical decision making or other assumptions about the safety or efficacy of a product. Additionally, it is important to remember that adverse event reports represent a small percentage of total usage numbers of a product. Common products may have a higher number of adverse events due to the higher total number of people using the product. openFDA, FDA

FDA adds: "There is no certainty that the reported event (adverse event or medication error) was actually due to the product. FDA does not require that a causal relationship between a product and event be proven, and reports do not always contain enough detail to properly evaluate an event." The information in these reports "cannot be used to estimate the incidence of these events."

Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated.

Not medical advice. This site counts what was reported to FDA. Questions about a medicine or device belong with a pharmacist or clinician.

39,602
reports recording the term: 0.2% of all reports; 1,704
reports, 12 months to June 2026: 1,888 in the 12 months before; 99.1%
marked serious by the reporter: 57.4% across all reports; 1.9%
record death among outcomes, as reported: 9.1% across all reports

39,602 reports in FDA's adverse event database record the MedDRA term "Abortion spontaneous" (in plain words, miscarriage): 0.2% of all reports received between January 2004 and June 2026. Coders pick the term that best matches the reporter's description.

1,704 reports recorded it in the 12 months to June 2026, down 10% from 1,888 in the 12 months before. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Of reports recording this term, 99.1% are marked serious, 1.9% include death among the outcomes and 7.3% include hospitalisation, as reported.

The drugs listed most often as suspect products in those reports are Humira, Levetiracetam and Tysabri. That order mostly follows how many reports each drug has overall; the table also gives the term's share within each drug's own reports. FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event."

Reports by month, five years

FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases.

Drugs listed as suspect products in these reports

Drug	Class	Reports with this term	Share of the drug's own reports
Humira	—	1,859	0.3%
Levetiracetam	—	1,582	3%
Tysabri	Integrin receptor antagonist	1,278	0.7%
Mirena	Progestin	982	0.8%
Enbrel	Tumor necrosis factor blocker	669	0.1%
Nexplanon	Progestin	594	1.4%
Remicade	Tumor necrosis factor blocker	585	0.4%
Rebif	Interferon beta	557	1.3%
Tecfidera	—	557	0.5%
Truvada	Human immunodeficiency virus nucleoside analog reverse transcriptase inhibitor	494	1.3%
Lamotrigine	Anti-epileptic agent	493	1.1%
ParaGard T 380A	Copper-containing intrauterine device	482	1.1%
Makena	—	480	2.1%
Avonex	Interferon beta	472	0.4%
Ciprofloxacin	Fluoroquinolone antibacterial	379	1%
Certolizumab pegol	Tumor necrosis factor blocker	370	1.4%
Ritonavir	Cytochrome P450 3A inhibitor	364	3.2%
Emtricitabine and tenofovir disoproxil fumarate	Human immunodeficiency virus nucleoside analog reverse transcriptase inhibitor	361	10.3%
Metronidazole	Nitroimidazole antimicrobial	360	1.5%
Gilenya	Sphingosine 1-phosphate receptor modulator	350	0.4%
Tegretol	Mood stabilizer	350	2.1%
Kaletra	Cytochrome P450 3A inhibitor	348	3.7%
Implanon	—	337	3.6%
Norvir	Cytochrome P450 3A inhibitor	335	3.8%
Keppra	—	325	1.3%

Drugs with a page on this site, ordered by the number of their reports recording this term. The last column is the term's share within that drug's own reports, against 0.2% across the whole database. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."

By pharmacologic class

Class	Reports with this term	Share of class reports	Median drug in class
Tumor necrosis factor blocker	2,559	0.2%	0.3%
Progestin	2,145	0.7%	0.2%
Integrin receptor antagonist	1,650	0.6%	0.5%
Anti-epileptic agent	1,538	0.6%	0.3%
Hepatitis B virus nucleoside analog reverse transcriptase inhibitor	1,248	1.7%	0.8%
Interferon beta	1,212	0.7%	1%
Human immunodeficiency virus nucleoside analog reverse transcriptase inhibitor	1,204	1.5%	1.1%
Atypical antipsychotic	1,120	0.2%	0%
Cytochrome P450 3A inhibitor	1,109	2.4%	0.8%
Protease inhibitor	785	3.5%	3.5%

Classes ordered by count. Class shares follow the class's overall report volume as much as anything else.

Patients in these reports

Patient age

Under 20.2%89

2 to 110%2

12 to 170.7%265

18 to 4449.6%19,625

45 to 641%412

65 to 740%9

75 and over0%1

Age not given48.5%19,199

Patient sex

Female93.6%37,083

Male0.4%148

Not given6%2,371

Grey bar: all 20,646,523 reports in the database. 38.5% of these reports give the United States as the country.

Questions about "Abortion spontaneous"

What does "Abortion spontaneous" mean in an adverse event report?

In plain language: miscarriage. It is a MedDRA preferred term, the dictionary FDA uses to code what a reporter described. The report's own description is not published by openFDA and is not shown here.

How many reports record abortion spontaneous?

39,602 reports through June 2026 (0.2% of all reports), 1,704 of them in the latest 12 months.

Which drugs appear most often in these reports?

Humira (1,859), Levetiracetam (1,582), Tysabri (1,278), Mirena (982) and Enbrel (669). Drugs with many reports overall lead almost every term's list. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."

Does a drug appearing here mean it was responsible for this reaction?

No. FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event."

I have this symptom. What should I do?

This site cannot assess anyone. A pharmacist or clinician can; for an emergency, call the local emergency number. Nothing on this page is medical advice.

Where this comes from. Counts are built from the openFDA Drug Adverse Event (FAERS) bulk export released 28 Sep 2026, which holds reports FDA received through 30 Jun 2026. Drug names are as reported, resolved to the brand or generic name on the FDA label where openFDA's harmonisation matched them; classes are the pharmacologic class (EPC) from the label and the National Drug Code Directory of 17 Sep 2026. Terms are pooled across spelling and capitalisation variants of one MedDRA preferred term. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.

Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.