Can You Use Natural Family Planning While Breastfeeding?

Yes, you can use natural family planning while breastfeeding, but it needs a little extra care. Breastfeeding often delays the return of fertility, yet it is not a guarantee, and your first ovulation can arrive before your first period. This guide explains how fertility returns after birth, how the Lactational Amenorrhea Method works and how to read your cycle signs during this in-between season.

Does breastfeeding stop you getting pregnant?

Frequent, round-the-clock breastfeeding raises prolactin, the hormone that keeps your milk flowing and quietly holds ovulation in pause. For many women this means no periods for a while after birth. The pause is real, but it is not permanent or fully reliable. As feeds space out, as night feeds drop away, or once your baby starts solids, that hormonal brake eases and ovulation can return without warning. Because the egg is released before any bleeding, your first ovulation can happen before your first period, so you can be fertile again with no monthly period to signal it.

What is the Lactational Amenorrhea Method?

The Lactational Amenorrhea Method, or LAM, is an evidence-based way to use breastfeeding itself as temporary birth control. It only works when three conditions are all true at the same time. When they are, research reports a pregnancy risk of under two in 100 women in the first six months, and the World Health Organization puts correct use at under one in 100.

What are the three LAM conditions?

Your baby is under six months old. Your periods have not yet returned. And you are fully or nearly fully breastfeeding, day and night, without long gaps between feeds and without regularly replacing feeds with formula or solids. The moment any one of these stops being true, LAM no longer protects you and you need another method, whether that is fertility-sign tracking or something else.

How do you track your cycle before your first period?

Because ovulation can return silently, sign-based tracking is the dependable way to spot returning fertility. The two core signs are cervical mucus and basal body temperature. Fertile-type mucus that is clear, slippery and stretchy is often the first hint that your body is waking up, and a sustained rise in temperature later confirms that ovulation has happened. Some methods are built for this postpartum stage: the Marquette Method adds a home hormone monitor that reads the hormones behind ovulation, which helps when mucus is hard to read, while the Billings Ovulation Method and the symptothermal method have their own breastfeeding guidelines.

How effective is NFP while breastfeeding?

Effectiveness is lower and harder to pin down in this phase than in settled cycles, simply because the signs are less tidy. For the Marquette Method postpartum protocol, peer-reviewed studies report roughly two to three unintended pregnancies per 100 women over a year with correct, consistent use, rising to about 12 to 14 per 100 with typical use. The takeaway is not to be discouraged but to be cautious: while you are learning your postpartum pattern, treat any fertile-type sign as fertile, and lean on a method that combines more than one sign.

Why is the postpartum phase trickier?

After birth your body can produce long stretches of unclear, patchy mucus, and your temperature may sit flat for weeks before the first true shift. You might see several false starts before fertility genuinely returns. This is normal, but it means the usual rules take more patience. Erring on the side of caution and, where you can, learning from a trained instructor make a real difference during this window.

When does fertility return while breastfeeding?

There is no fixed date, and the range between women is wide. Exclusive, frequent breastfeeding can hold fertility off for many months, while women who feed less often or introduce bottles and solids earlier may see their cycles return within a couple of months of birth. Night weaning, longer gaps between feeds and your baby sleeping through all tend to nudge fertility back. Rather than counting on a calendar, watch your own signs, because your body will show the change before a period does.

Related reading: How to Track Your Cycle with Basal Body Temperature and Cervical Mucus and How Do You Start Natural Family Planning After Coming Off the Pill?.

How Majella helps

Majella is a cycle and fertility tracking app made for women of faith who practise natural family planning. During breastfeeding it gives you one calm place to log your cervical mucus and basal body temperature each day, so patchy postpartum patterns are easier to read and you can see returning fertility as it happens. Cycle tracking is free, the fuller NFP features are paid, and your data stays private on your own device rather than on a company server.

Frequently asked questions

Can you get pregnant while breastfeeding and not having periods?

Yes. Because ovulation happens before your period arrives, you can release an egg and conceive before you ever see that first postpartum bleed. Breastfeeding lowers the odds but does not remove them.

Is breastfeeding a reliable form of birth control?

Only under strict conditions. The Lactational Amenorrhea Method is reliable in the first six months when your baby is under six months old, your periods have not returned, and you are fully breastfeeding day and night. Once any of those changes, breastfeeding alone is not dependable.

How soon after birth can I start tracking my cycle?

You can begin observing your mucus and temperature straight away. Early on the signs may be unclear for weeks, so many women use this time to get familiar with charting before their fertility actually returns.

Which NFP method is best while breastfeeding?

There is no single best method, but ones designed for the postpartum stage help most. The Marquette Method adds a hormone monitor that is useful when mucus is confusing, while the Billings Ovulation Method and symptothermal method offer specific breastfeeding guidelines. A trained instructor can help you choose.

References

Kennedy KI, Rivera R, McNeilly AS. Consensus statement on the use of breastfeeding as a family planning method. Contraception. 1989;39(5):477-496.

Labbok MH, Hight-Laukaran V, Peterson AE, et al. Multicenter study of the Lactational Amenorrhea Method (LAM): I. Efficacy, duration, and implications for clinical application. Contraception. 1997;55(6):327-336.

Van der Wijden C, Manion C. Lactational amenorrhoea method for family planning. Cochrane Database of Systematic Reviews. 2015;(10):CD001329.

Bouchard T, Fehring RJ, Schneider M. Efficacy of a new postpartum transition protocol for avoiding pregnancy. Journal of the American Board of Family Medicine. 2013;26(1):35-44.

Fehring RJ, Schneider M, Bouchard T. Effectiveness of an online natural family planning program for breastfeeding women. Journal of Obstetric, Gynecologic and Neonatal Nursing. 2017;46(4):e129-e137.

Perez A, Vela P, Masnick GS, Potter RG. First ovulation after childbirth: the effect of breast-feeding. American Journal of Obstetrics and Gynecology. 1972;114(8):1041-1047.

This article is for education only and is not medical advice. Speak with your doctor or a qualified fertility-awareness instructor about your own situation, especially after birth or if your cycles are irregular.