What is the Lactational Amenorrhea Method (LAM)?

After childbirth, breastfeeding can affect more than your baby's nutrition. Frequent breastfeeding can also delay the return of ovulation and periods for some time. If you are breastfeeding and want to delay another pregnancy, you may have heard that breastfeeding itself can work as contraception. This is known as the lactational amenorrhea method (LAM). It can provide protection against pregnancy during the first six months after childbirth, but only when specific conditions are met. Knowing these conditions can help you understand when LAM can be relied on and when you need another form of contraception.

What Is the Lactational Amenorrhea Method?

The lactational amenorrhea method (LAM) is a temporary contraceptive method based on frequent breastfeeding. Suckling stimulates the release of prolactin, the hormone that supports milk production. Frequent breastfeeding keeps prolactin levels elevated and suppresses the hormonal signals needed for ovulation. This can delay ovulation, but breastfeeding does not stop fertility permanently. Ovulation can happen before the first menstrual period after delivery.

How Does the Lactational Amenorrhea Method Work?

Frequent suckling reduces the release of hormones needed for ovulation. Prolactin remains high to support milk production, while the hormonal pattern needed for regular ovulation is suppressed. Breastfeeding needs to happen regularly, including during the night. Long gaps between feeds, regular supplementation and reduced breastfeeding can weaken this effect.

What Are the Conditions for Using LAM?

LAM can be relied on for contraception only when all three conditions are present:

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Condition	What It Means
No periods	Your menstrual bleeding has not returned after childbirth.
Baby under 6 months	Your baby has not reached six months of age.
Fully or nearly fully breastfed	Breast milk provides at least 85% of feeds, with frequent breastfeeding during the day and night.

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If your baby starts receiving regular formula or complementary foods, breastfeeding becomes less frequent, or your periods return, switch to another contraceptive method if you want to avoid pregnancy.

Lactational Amenorrhea Duration: How Long Does LAM Work?

The contraceptive window for LAM is limited to the first six months after childbirth. Even if you continue breastfeeding and have not had a period, LAM should not remain your only contraceptive method once your baby reaches six months. Fertility may return earlier if feeds become less frequent, night feeds stop, or regular formula or complementary foods are introduced.

Lactational Amenorrhea Method Effectiveness

When all three criteria are followed correctly, LAM is highly effective. About 0.5 pregnancies occur per 100 women during the first six months with correct and consistent use. With typical use, the figure is about 2 pregnancies per 100 women during the same period.

However, its effectiveness can decrease when:

Breastfeeding becomes less frequent.
There are long gaps between feeds.
Formula feeds are introduced regularly.
Solid or other complementary foods replace breastfeeds.
Menstrual bleeding returns.
The baby reaches six months.

LAM prevents pregnancy but does not protect against sexually transmitted infections. Condoms are needed for STI protection.

When Does LAM Stop Working?

LAM should be stopped as a sole contraceptive method as soon as any one of the three conditions is no longer met. This includes:

Your baby turns 6 months old.
Your menstrual periods return.
Your baby is no longer fully or nearly fully breastfed.
Breastfeeding becomes much less frequent.
Regular formula or complementary feeding changes the feeding pattern.

You do not need to stop breastfeeding when LAM stops. You only need another contraceptive method if you want to prevent pregnancy.

What Happens When Your Period Returns While Breastfeeding?

Your periods can return while you are still breastfeeding. Once menstrual bleeding returns, LAM is no longer considered reliable contraception. Remember that ovulation happens before a period. This means pregnancy can occur before you see your first postpartum period. If you do not want another pregnancy, discuss another contraceptive option with your gynaecologist.

What Are the Benefits and Limitations of LAM?

LAM requires no medicine or device and does not interfere with breastfeeding. It can be used immediately after birth when all three conditions are met. Its main limitation is that it is short-term and depends on maintaining a specific breastfeeding pattern. It also does not protect against sexually transmitted infections.

What Birth Control Options Can Be Used After LAM?

After LAM, options may include condoms, copper IUCDs, progestin-only contraceptive pills, injectable contraception and permanent methods such as female sterilisation.

Your gynaecologist can help you choose a method based on your health, breastfeeding routine and desired birth spacing.

What Sets Cloudnine Apart?

Cloudnine provides maternity, gynaecology and breastfeeding support, which can be useful during the transition from pregnancy to postpartum care. Lactation support can help with breastfeeding position, latch, feeding difficulties, engorgement and maintaining breastfeeding.

For women using LAM, this support can help them recognise changes in breastfeeding that mean another contraceptive method is needed.

You can discuss changes in your periods, feeding routine or plans for another pregnancy during these visits. This means you can get support with breastfeeding while also making informed decisions about when and how to prevent your next pregnancy.

Conclusion

LAM can be a practical short-term contraceptive option when breastfeeding is frequent, periods have not returned and the baby is under six months old. Its effectiveness depends on meeting all three conditions, not simply on breastfeeding or having no periods. If your baby starts taking regular supplementary feeds, your feeding pattern changes, your periods return or your baby reaches six months, move to another contraceptive method if you want to prevent pregnancy. You can continue breastfeeding while using another suitable form of contraception.

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Frequently Asked Questions

1. How can breastfeeding prevent pregnancy?

Frequent breastfeeding increases prolactin and suppresses the hormonal signals that trigger ovulation. This can delay the release of an egg and reduce the chance of pregnancy.

2. What are the three criteria for lactational amenorrhoea?

The 3 criteria are: Your periods must not have returned, your baby must be less than six months old, and your baby must be fully or nearly fully breastfed with frequent feeds during the day and night.

3. Can I get pregnant with lactational amenorrhea?

Pregnancy is possible if any LAM condition is not met. Fertility can also return before the first postpartum period, so LAM should be followed exactly to provide reliable protection.

4. Is it normal to have lactational amenorrhea for 2 years?

Periods can remain absent for a long time during breastfeeding, but two years without periods is beyond the six-month period in which LAM can be used as contraception. If you have not had a period for two years, speak to your gynaecologist to check the cause and discuss contraception.