Barrier Methods of Contraception: Condoms, Diaphragm, Cap and Spermicide

Post focus: Barrier contraception — external and internal condoms, diaphragms, cervical caps, contraceptive sponges, spermicides, dental dams, correct technique, effectiveness, contraindications, complications, failure management and dual protection.

Learning objectives

• Explain how physical and chemical barriers prevent sperm from entering the cervix.
• Demonstrate correct external/internal condom use and troubleshoot breakage/slippage.
• Compare diaphragms, cervical caps, sponges and spermicides by fitting, timing, duration and limitations.
• Identify latex allergy, recurrent UTI, toxic-shock risk and nonoxynol-9 cautions.
• Provide dual protection, emergency contraception and HIV PEP after barrier failure.

1. What are barrier methods?

Barrier methods physically block sperm at the penis, vagina or cervix; spermicides chemically immobilise or kill sperm. They are non-hormonal, reversible and generally safe for people with medical contraindications to hormones. Their effectiveness depends on correct use for every act, early application, intact products, adequate lubrication and partner cooperation.

2. Comparison

3. External condom: complete technique

1. Check expiry, package integrity and quality mark; store cool/dry away from wallets, heat and sharp objects.
2. Open carefully at the edge; do not use teeth or scissors.
3. Put on before any genital, anal or oral contact. Pinch the reservoir tip to remove air.
4. Roll all the way to the base of the erect penis; if it does not roll, discard and use a new one (it may be inside-out).
5. Use sufficient water- or silicone-based lubricant. Oil-based products weaken latex; check polyurethane/polyisoprene compatibility.
6. After ejaculation hold the rim/base during withdrawal, before loss of erection. Tie/wrap and discard; never flush or reuse.
7. Use a new condom for each act and when changing from anal to vaginal sex or sharing sex toys.

3.1 Common errors

• Late application, reusing, double-condom use, sharp fingernails/jewellery, insufficient lubrication and storing in heat.
• Not checking for tears, failing to hold during withdrawal, or using a condom past expiry.

4. Internal condom

1. Check package/expiry. Find the inner ring and insert the pouch into the vagina, pushing the inner ring past the pubic bone; the outer ring remains outside.
2. Guide the penis into the pouch, not between pouch and vaginal wall. Use compatible lubricant if needed.
3. Twist the outer ring after withdrawal and remove gently; discard—do not flush or reuse.
4. Never use an internal and external condom simultaneously because friction can cause tearing.

Internal condoms can be inserted before sex and may be useful when the receptive partner wants greater control. Availability and correct fit may vary; demonstrate with a model when possible.

5. Diaphragm

A diaphragm is a flexible dome that covers the cervix. A trained provider fits the size; the client inserts it with spermicide before intercourse and checks that the cervix is covered. It can usually be inserted up to 2 hours before sex, must remain for at least 6 hours after the last act and should not remain beyond the product’s maximum (often 24 hours).

• Use additional spermicide for each act according to product instructions; do not douche while in place.
• Remove with a finger, wash with mild soap/water, dry and store in its case; inspect for holes.
• Re-fit after childbirth, second-trimester abortion, major weight change or recurrent displacement.
• Avoid with current toxic-shock syndrome, severe recurrent UTI, significant pelvic-floor abnormality or inability to insert/remove safely; use MEC and product guidance.

6. Cervical cap and sponge

The cap fits directly over the cervix and is used with spermicide; it may remain for a product-specific period after sex but should not exceed the recommended maximum. Effectiveness is lower after vaginal birth because the cervix/contour changes. A sponge combines a physical barrier and spermicide; insert before intercourse, ensure the loop is accessible for removal, and respect the maximum wear time. Both can cause irritation, abnormal discharge, difficult removal and rare toxic-shock syndrome.

7. Spermicides and vaginal gels

Nonoxynol-9 and other spermicides disrupt sperm membranes. Apply deep in the vagina before each act and reapply when directed. They are less effective alone than condoms and do not prevent HIV; frequent use of nonoxynol-9 can irritate mucosa and increase HIV risk. Consider alternative or additional methods for people with high HIV exposure or recurrent irritation.

8. Advantages

• No systemic hormones; immediate reversibility and use only when needed.
• External/internal condoms reduce HIV, gonorrhoea, chlamydia and some other STI transmission when used consistently/correctly.
• Accessible, inexpensive, private and usable during breastfeeding; external condoms also prevent semen exposure.
• Can be combined with hormonal/IUD methods for dual protection and additional pregnancy prevention.

9. Limitations and contraindications

• Most barrier methods are less effective than implants/IUDs with typical use because each act requires correct action.
• Latex allergy: use polyurethane/polyisoprene or non-latex products; assess anaphylaxis history.
• Diaphragm/cap/sponge may be unsuitable with recurrent UTI, pelvic-floor abnormality, current vaginal/cervical infection or inability to insert/remove.
• Do not use spermicide/nonoxynol-9 frequently for HIV prevention; it is not an HIV prophylaxis.
• Condoms may break due to friction, oil products, heat, expired/damaged packaging or incorrect size/technique.

10. What to do after condom breakage/slippage

1. Stop, remove the failed condom and wash externally with water; do not douche or use antiseptics internally.
2. Assess pregnancy risk and offer emergency contraception: copper IUD within five days, levonorgestrel 1.5 mg orally once as soon as possible, or ulipristal 30 mg once where available.
3. Assess HIV exposure urgently: PEP is most effective as soon as possible and generally no later than 72 hours; provide baseline testing and a complete 28-day regimen under national HIV protocol.
4. Offer STI/hepatitis B testing, vaccination and follow-up; treat symptoms and partners rather than waiting for complications.
5. Discuss a method change, better lubrication/size and dual protection.

11. Counselling and negotiation

• Ask what method feels acceptable and whether condom negotiation is safe. Partner violence can make “just use a condom” unsafe; offer discreet options and GBV referral.
• Demonstrate rather than assume technique; allow the client to practise with a model.
• Explain that condoms protect against many but not all infections because uncovered skin can transmit herpes, HPV and syphilis.
• Supply enough condoms/lubricant, explain storage and check understanding with teach-back.
• Offer HIV PrEP/PEP, vaccination, STI screening and contraception for pregnancy goals.

12. Follow-up and complications

• Return for severe pain, rash/swelling, allergic reaction, persistent irritation, fever, offensive discharge, suspected retained device, toxic-shock symptoms or pregnancy.
• For diaphragm/cap/sponge users, review fit, removal, wear time and recurrent UTI/irritation; stop and reassess if symptoms recur.
• After STI exposure, repeat tests according to window period and reinfection risk; partners require evaluation.

13. Worked cases

Case 1: latex allergy

Ask about urticaria, wheeze or anaphylaxis after condoms. Provide non-latex external/internal condoms, compatible lubricant and emergency advice; do not encourage repeated latex exposure.

Case 2: recurrent condom breakage

Check size, storage, expiry, oil-based lubricant, double-condom use and application timing. Demonstrate technique, supply silicone/water lubricant and discuss a reliable pregnancy method plus condoms for STI protection.

Case 3: diaphragm user with fever and foul discharge

Remove the device, assess for infection/toxic shock, pregnancy and pelvic pain, provide urgent examination/treatment and stop use until a clinician clears it. Do not leave a device in place while treating unexplained fever.

14. Quick self-test

1. Which barrier method provides the strongest STI/HIV protection?
2. Why must an external and internal condom not be used together?
3. How long should a diaphragm usually remain after the last intercourse?
4. Why is frequent nonoxynol-9 use unsafe for people at high HIV risk?
5. What emergency services should be considered after condom failure?

Further study and source material

• Slideshare: Barrier methods of contraception.
• WHO condoms and lubricants.
• WHO condom questions and answers.
• WHO nonoxynol-9 safety warning.
• Uganda National Comprehensive Condom Programming Strategy.

Take-home: Barrier success depends on correct use every time. Condoms are the STI-protective barrier; fit/follow product instructions for diaphragms, caps and sponges; avoid nonoxynol-9 for HIV prevention; and act quickly after failure with EC, PEP and testing.