TL;DR
- Lactational amenorrhea method (LAM) up to 6 months – 98% effective if strict conditions hold: exclusive breastfeeding, intervals at most 4 hours during the day and 6 hours at night, no return of menses. Beyond 6 months or if conditions break, another method is needed.
- Progestin-only pills (Cerazette, desogestrel 75 mcg; Slinda, drospirenone) – compatible from day one postpartum. RID < 1%, no impact on milk supply.
- Intrauterine devices: copper IUD (Mona Lisa, Multiload) and levonorgestrel IUDs (Mirena, Kyleena, Jaydess) – placed at 4 weeks after vaginal birth and 6 weeks after C-section. Fully compatible.
- Implant Nexplanon (etonogestrel) – placed immediately postpartum or any time. Compatible.
- Depo-Provera (medroxyprogesterone 150 mg IM every 3 months) – compatible, but WHO MEC suggests waiting 6 weeks for theoretical milk-supply and mood reasons.
- Combined oral contraceptives (ethinyl estradiol + progestin) – postponed at least to 6 weeks (VTE risk); most clinicians delay to 6 months due to theoretical milk-supply reduction in some women.
- Plan B / Postinor (levonorgestrel 1.5 mg single dose) – compatible with no nursing pause.
- EllaOne / Ella (ulipristal acetate 30 mg single dose) – 24-hour nursing pause after dose.
- Condoms and spermicides – safe without limits.
- Sterilization (tubal ligation, partner vasectomy) – permanent decision, separate counseling.
The specific method is chosen by the gynecologist factoring in age, parity, VTE risk, migraine, breastfeeding pattern and personal preference.
When fertility returns
Ovulation in non-breastfeeding women returns on average at 6 weeks postpartum; in nursing mothers fulfilling LAM conditions, at 6 months. The first ovulation usually precedes the first menses – pregnancy is possible “without periods”.
Implication: contraception is needed from 6 weeks postpartum if nursing is not exclusive, and no later than 6 months in any case, or earlier if menses return.
Lactational amenorrhea method (LAM)
Among the most effective methods in the first 6 months postpartum when three conditions hold simultaneously:
- Less than 6 months postpartum.
- Menses have not returned.
- Exclusive breastfeeding – only breast milk (no water, formula, complementary food), on demand, at least one night feeding, intervals at most 4 hours day and 6 hours night.
Effectiveness is 98% under strict adherence. As soon as any condition breaks, the method loses effectiveness rapidly and a backup method is needed.
Progestin methods – first line
Progestin-only pills
Desogestrel 75 mcg (Cerazette, Cerelle, generics) – taken continuously daily at the same hour. 12-hour late window. Ovulation suppression in 97% of women. RID < 1%, no lactation effect.
Drospirenone 4 mg (Slinda) – modern alternative. 24-hour late window. Good tolerability, no significant potassium rise in healthy women. Suitable when edema is a concern.
Older levonorgestrel-only pills (Microlut, Norgeston) are now rarely prescribed due to a 3-hour late window.
Implant
Etonogestrel 68 mg (Nexplanon) – subdermal rod placed for 3 years. Effectiveness > 99.9%, higher than most other methods. Compatible with lactation from birth. Per FSRH 2018 meta-analysis (reaffirmed 2023), even placement in the first 48 hours does not affect milk supply.
Intrauterine devices
Levonorgestrel IUDs (Mirena 52 mg, Kyleena 19.5 mg, Jaydess 13.5 mg) – release levonorgestrel locally into the uterus. Systemic absorption minimal. Placement at 4 weeks postpartum after vaginal birth and 6 weeks after C-section is optimal per WHO MEC. Lifespan 3–8 years.
Copper IUD (Mona Lisa Cu, Multiload Cu, Nova-T) – hormone-free. Suitable when hormones are unwanted or contraindicated. Lifespan 5–10 years. May increase menstrual bleeding, often acceptable in nursing mothers with long amenorrhea.
Depo-Provera
Medroxyprogesterone 150 mg IM every 12 weeks. Effectiveness 94–99%. Lactation-compatible. WHO MEC 2015 suggests waiting 6 weeks postpartum for theoretical milk-supply and depression-risk reasons. Not recommended long-term (> 2 years) due to reversible bone mineral density reduction.
Combined methods – postpone
Combined oral contraceptives (COCs)
Ethinyl estradiol + progestin. Effectiveness 91–99% with correct use. In nursing mothers:
- First 21 days postpartum – contraindicated (elevated VTE risk).
- 22–42 days postpartum – contraindicated when additional VTE risk factors exist; otherwise limited use possible.
- From 6 weeks postpartum – acceptable, but WHO MEC and AAP 2024 recommend waiting until 6 months because estrogen may reduce milk supply in some women (especially at 30 mcg and above).
In real practice: if nursing is exclusive and adequate, COCs are postponed until exclusive period ends and a progestin-only method is used. If nursing is mixed and supply reduction is not critical, COCs are possible from 6 weeks.
Combined ring, patch
Same logic as COCs – postpone to 6 weeks – 6 months.
Emergency contraception
Levonorgestrel 1.5 mg (Plan B, Postinor-2, Escapelle, NorLevo)
Single dose after unprotected intercourse within 72 hours (efficacy declines with time). Compatible with breastfeeding with no nursing pause. RID < 1%, infant exposure through milk is negligible.
Ulipristal acetate 30 mg (EllaOne, Ella)
Single dose within 120 hours of intercourse. More effective than LNG, particularly at 72–120 hours. Recommended nursing pause: 24 hours after the dose (expressed milk during the window is discarded). Per e-lactancia.org, “low risk, temporary pause recommended”.
For emergency contraception in a nursing mother, LNG-1500 is preferred by logistics (no nursing pause). EllaOne is preferred at 72–120 hours or BMI > 30 kg/m².
Copper IUD as emergency contraception
Placement within 120 hours of unprotected intercourse is the most effective EC method (> 99%) and provides long-term contraception. Suitable for nursing mothers after the 4-week postpartum window.
Barrier and spermicidal methods
Condoms (male, female), diaphragm, cervical cap, spermicides with nonoxynol-9 – safe without restriction any time postpartum. Typical effectiveness 71–88%, higher with perfect use.
A pre-pregnancy diaphragm is checked for size by a gynecologist before resuming use – the cervix size may have changed.
Sterilization
Tubal ligation (postpartum immediately or laparoscopic at 4–6 weeks) is permanent. Effectiveness > 99%. Counseling for finality is essential.
Partner vasectomy – the most effective and least invasive method of couple sterilization, outpatient.
What to pick – orientation
| Scenario | First line |
|---|---|
| Want a method right after delivery and breastfeed exclusively | LAM + progestin-only pill from week 6, or Nexplanon at hospital |
| Hormone-free preference | Copper IUD from week 4, condoms |
| Want long-term highly effective method | Mirena (5–8 years) or Nexplanon (3 years) |
| Done breastfeeding, want a pill | Low-dose COC, drospirenone 4 mg |
| Family planning complete | Tubal ligation or partner vasectomy |
| Unprotected intercourse < 72 hours | Plan B (LNG 1.5 mg) – no nursing pause |
| Intercourse 72–120 hours | EllaOne 30 mg + 24-hour pause, or copper IUD placement |
Summary
Most contraceptive methods are compatible with breastfeeding. Progestin-only methods are first line. Combined methods are postponed to 6 weeks – 6 months. Barrier methods and emergency contraception work at any time.
The specific method is chosen by the gynecologist based on age, parity, risk factors and personal preference. If a prescription raises doubt, a second opinion with a family planning specialist or a clinician experienced with nursing mothers is reasonable.
Authors: Evigrade editorial team with Victoria Gankova, MD. Sources: WHO Medical Eligibility Criteria for Contraceptive Use 2015 + Update 2024, CDC US-MEC 2024, FSRH Clinical Guideline on combined hormonal contraception 2024, NICE NG140 LARC 2023 update, SEGO Documento de Consenso “Anticoncepción posparto” 2023, e-lactancia.org. Detailed citations on the individual drug cards.