Appendices for U.S. Selected Practice Recommendations for Contraceptive Use, 2024
Recommendations and Reports / August 8, 2024 / 73 (3);1–77
Appendix A: Summary of Classifications for U.S. Medical Eligibility Criteria for Contraceptive Use, 2024
Health care providers can use the summary table as a quick reference guide to the classifications for hormonal contraceptive methods and intrauterine contraception to compare classifications across these methods (Box A1) (Table A1). For complete guidance, see U.S. Medical Eligibility Criteria for Contraceptive Use, 2024 (U.S. MEC) (1) for clarifications to the numeric categories, as well as for summaries of the evidence and additional comments. Hormonal contraceptives and intrauterine devices do not protect against sexually transmitted infections (STIs), including HIV infection, and persons using these methods should be counseled that consistent and correct use of external (male) latex condoms reduces the risk for STIs, including HIV infection (2). Use of internal (female) condoms can provide protection from transmission of STIs, although data are limited (2). Patients also should be counseled that pre-exposure prophylaxis, when taken as prescribed, is highly effective for preventing HIV infection (3).
BOX A1. Categories for classifying hormonal contraceptives and intrauterine devices
U.S. MEC 1 = A condition for which there is no restriction for the use of the contraceptive method
U.S. MEC 2 = A condition for which the advantages of using the method generally outweigh the theoretical or proven risks
U.S. MEC 3 = A condition for which the theoretical or proven risks usually outweigh the advantages of using the method
U.S. MEC 4 = A condition that represents an unacceptable health risk if the contraceptive method is used
Abbreviation: U.S. MEC = U.S. Medical Eligibility Criteria for Contraceptive Use.
Abbreviations: ARV = antiretroviral; BMI = body mass index; CHC = combined hormonal contraceptive; COC = combined oral contraceptive; Cu-IUD = copper intrauterine device; DMPA = depot medroxyprogesterone acetate; DRSP = drospirenone; DVT = deep venous thrombosis; hCG = human chorionic gonadotropin; HDL = high-density lipoprotein; IUD = intrauterine device; LDL = low-density lipoprotein; LNG-IUD = levonorgestrel intrauterine device; NA = not applicable; PE = pulmonary embolism; PID = pelvic inflammatory disease; POP = progestin-only pill; PrEP = pre-exposure prophylaxis; STI = sexually transmitted infection; VTE = venous thromboembolism.
* Consult the respective appendix for each contraceptive method in U.S. Medical Eligibility Criteria for Contraceptive Use, 2024 (1) for clarifications to the numeric categories.
References
- Nguyen AT, Curtis KM, Tepper NK, et al. U.S. medical eligibility criteria for contraceptive use, 2024. MMWR Recomm Rep 2024;73(No. RR-4):1–126.
- Workowski KA, Bachmann LH, Chan PA, et al. Sexually transmitted infections treatment guidelines, 2021. MMWR Recomm Rep 2021;70(No. RR-4):1–187.
- ÐÇ¿ÕÓéÀÖ¹ÙÍø. US Public Health Service preexposure prophylaxis for the prevention of HIV infection in the United States—2021 update: a clinical practice guideline. Atlanta, GA: US Department of Health and Human Services, ÐÇ¿ÕÓéÀÖ¹ÙÍø; 2021. /hiv/pdf/risk/prep/cdc-hiv-prep-guidelines-2021.pdf
- The Criteria Committee of the New York Heart Association. Nomenclature and criteria for diagnosis of diseases of the heart and great vessels. 9th ed. Boston, MA: Little, Brown and Co; 1994.
- Panel on Treatment of HIV During Pregnancy and Prevention of Perinatal Transmission. Recommendations for the use of antiretroviral drugs during pregnancy and interventions to reduce perinatal HIV transmission in the United States. Washington, DC: US Department of Health and Human Services; 2023.
- Panel on Antiretroviral Guidelines for Adults and Adolescents. Guidelines for the use of antiretroviral agents in adults and adolescents with HIV. Washington, DC: US Department of Health and Human Services; 2023.
Appendix B: When To Start Using Specific Contraceptive Methods
This appendix summarizes recommendations for when to start using specific contraceptive methods (Table B1).
Abbreviations: BMI = body mass index; CHC = combined hormonal contraceptive; Cu-IUD = copper intrauterine device; DMPA = depot medroxyprogesterone acetate; IUD = intrauterine device; LNG-IUD = levonorgestrel intrauterine device; POP = progestin-only pill; STI = sexually transmitted infection; U.S. MEC = U.S. Medical Eligibility Criteria for Contraceptive Use.
* As appropriate, see recommendations for Emergency Contraception.
† Weight (BMI) measurement is not needed to determine medical eligibility for any methods of contraception because all methods can be used (U.S. MEC 1) or generally can be used (U.S. MEC 2) among patients with obesity (BMI ≥30 kg/m2). However, measuring weight and calculating BMI (weight [kg]/height [m]2) at baseline might be helpful for discussing concerns about any changes in weight and whether changes might be related to use of the contraceptive method.
§ Most patients do not require additional STI screening at the time of IUD placement. If a patient with risk factors for STIs has not been screened for gonorrhea and chlamydia according to ÐÇ¿ÕÓéÀÖ¹ÙÍø’s Sexually Transmitted Infections Treatment Guidelines (/std/treatment-guidelines/default.htm), screening may be performed at the time of IUD placement, and placement should not be delayed. Patients with current purulent cervicitis or chlamydial infection or gonococcal infection should not undergo IUD placement (U.S. MEC 4).
¶ In situations in which the health care provider is uncertain whether the patient might be pregnant, the benefits of starting the implant, DMPA, CHC, and POP likely exceed any risk; therefore, starting the implant, DMPA, CHC, and POP should be considered at any time, with a follow-up pregnancy test in 2–4 weeks.
Appendix C: Examinations and Tests Needed Before Initiation of Contraceptive Methods
The examinations and tests noted apply to patients who are presumed to be healthy (Table C1). Those with known medical problems or other special conditions might need additional examinations and tests before being determined to be appropriate candidates for a particular method of contraception. U.S. Medical Eligibility Criteria for Contraceptive Use, 2024 (U.S. MEC) might be useful in such circumstances (1). The following classification was considered useful in differentiating the applicability of the various examinations and tests (2):
- Class A: Essential and mandatory in all circumstances for safe and effective use of the contraceptive method.
- Class B: Contributes substantially to safe and effective use, but implementation may be considered within the public health context, service context, or both; risk of not performing an examination or test should be balanced against the benefits of making the contraceptive method available.
- Class C: Does not contribute substantially to safe and effective use of the contraceptive method.
These classifications focus on the relation of the examinations or tests to safe initiation of a contraceptive method. They are not intended to address the appropriateness of these examinations or tests in other circumstances. For example, certain examinations or tests that are not deemed necessary for safe and effective contraceptive use might be appropriate for good preventive health care or for diagnosing or assessing suspected medical conditions. Any additional screening needed for preventive health care can be performed at the time of contraception initiation, and initiation should not be delayed for test results.
No examinations or tests are needed before initiating condoms, spermicides, or vaginal pH modulators. A bimanual examination is necessary for diaphragm fitting. A bimanual examination and cervical inspection are needed for cervical cap fitting.
Abbreviations: BMI = body mass index; CHC = combined hormonal contraceptive; Cu-IUD = copper intrauterine device; DMPA = depot medroxyprogesterone acetate; IUD = intrauterine device; LNG-IUD = levonorgestrel intrauterine device; POP = progestin-only pill; STI = sexually transmitted infection; U.S. MEC = U.S. Medical Eligibility Criteria for Contraceptive Use.
* In instances in which blood pressure cannot be measured by a provider, blood pressure measured in other settings can be reported by the patient to their provider.
† Weight (BMI) measurement is not needed to determine medical eligibility for any methods of contraception because all methods can be used (U.S. MEC 1) or generally can be used (U.S. MEC 2) among patients with obesity (BMI ≥30 kg/m2). However, measuring weight and calculating BMI at baseline might be helpful for discussing concerns about any changes in weight and whether changes might be related to use of the contraceptive method.
§ A bimanual examination (not cervical inspection) is needed for diaphragm fitting.
¶ Most patients do not require additional STI screening at the time of IUD placement. If a patient with risk factors for STIs has not been screened for gonorrhea and chlamydia according to ÐÇ¿ÕÓéÀÖ¹ÙÍø’s Sexually Transmitted Infections Treatment Guidelines (/std/treatment-guidelines/default.htm), screening may be performed at the time of IUD placement, and placement should not be delayed. Patients with current purulent cervicitis or chlamydial infection or gonococcal infection should not undergo IUD placement (U.S. MEC 4).
References
- Nguyen AT, Curtis KM, Tepper NK, et al. U.S. medical eligibility criteria for contraceptive use, 2024. MMWR Recomm Rep 2024;73(No. RR-4):1–126.
- World Health Organization. Selected practice recommendations for contraceptive use, 2nd ed. Geneva, Switzerland: WHO Press; 2004.
Appendix D: Routine Follow-Up After Contraceptive Initiation
This appendix addresses when routine follow-up is recommended for safe and effective continued use of contraception for healthy patients (Table D1). The recommendations refer to general situations and might vary for different users and different situations. Specific populations who might benefit from more frequent follow-up visits include adolescents, those with certain medical conditions or characteristics, and those with multiple medical conditions.
Abbreviations: CHC = combined hormonal contraceptive; Cu-IUD = copper intrauterine device; DMPA = depot medroxyprogesterone acetate; IUD = intrauterine device; LNG-IUD = levonorgestrel intrauterine device; POP = progestin-only pill; U.S. MEC = U.S. Medical Eligibility Criteria for Contraceptive Use.
* The action is applicable to the contraceptive method.
† The action is not applicable to the contraceptive method.
Appendix E: Management of Bleeding Irregularities While Using Contraception
This appendix summarizes recommendations for management of bleeding irregularities while using contraception (Figure E1).
FIGURE E1. Management of bleeding irregularities while using contraception*

Abbreviations: CHC = combined hormonal contraceptive; COC = combined oral contraceptive; Cu-IUD = copper intrauterine device; DMPA = depot medroxyprogesterone acetate; EE = ethinyl estradiol; LNG-IUD = levonorgestrel intrauterine device; NSAID = nonsteroidal anti-inflammatory drug; SERM = selective estrogen receptor modulator.
* If clinically indicated, consider an underlying health condition, such as interactions with other medications, sexually transmitted infections, pregnancy, thyroid disorders, or new pathologic uterine conditions (e.g., polyps or fibroids). If an underlying health condition is found, treat the condition or refer for care.
Appendix F: Management of Intrauterine Devices When Users Are Found To Have Pelvic Inflammatory Disease
This appendix summarizes recommendations for management of intrauterine devices when users are found to have pelvic inflammatory disease (Figure F1).
FIGURE F1. Management of intrauterine devices when users of copper intrauterine devices or levonorgestrel intrauterine devices are found to have pelvic inflammatory disease*

Abbreviations: IUD = intrauterine device; PID = pelvic inflammatory disease.
* Refer to ÐÇ¿ÕÓéÀÖ¹ÙÍø Sexually Transmitted Infections Treatment Guidelines (/std/treatment-guidelines/default.htm) for information on PID diagnostic considerations and treatment regimens.
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