Inducing lactation means building a milk supply without having been pregnant, and it works through a combination of hormonal preparation and consistent breast stimulation. The process typically takes several months of preparation and is used by adoptive parents, surrogacy parents, partners in same-sex couples, and transgender women. While a full milk supply isn’t guaranteed, many people produce enough to partially or fully breastfeed.
How the Body Produces Milk Without Pregnancy
During pregnancy, rising levels of estrogen and progesterone cause breast tissue to develop milk-producing structures. After birth, those hormones drop sharply, and prolactin (a hormone that drives milk production) takes over. Induced lactation recreates this hormonal sequence artificially: first, you expose breast tissue to estrogen and progesterone for weeks or months, then you withdraw those hormones while boosting prolactin. The final ingredient is physical stimulation through pumping or nursing, which signals the body to keep producing milk.
This three-phase approach, sometimes called the Newman-Goldfarb protocol, is the most widely referenced method. It was developed through the Canadian Breastfeeding Foundation and remains the basis for most clinical guidance on induced lactation today.
Phase 1: Hormonal Priming
The first phase mimics pregnancy by introducing estrogen and progesterone, most commonly through a combination birth control pill. You take only the active pills, skipping any placebo pills and moving straight to the next pack. This phase should last at least 16 weeks, and longer is generally better. If you know months in advance when a baby will arrive, starting as early as six months out gives breast tissue more time to develop.
At the same time, a medication called domperidone is used to raise prolactin levels. Outside the United States, domperidone is the standard choice for this purpose. Initial doses typically start at 30 mg three times a day (90 mg total), with gradual increases up to 120 or even 150 mg daily depending on response and tolerance. Starting at a lower dose helps avoid side effects like headaches or digestive discomfort before moving higher.
The hormonal priming phase continues until about six to eight weeks before the baby is expected to arrive. At that point, you stop the birth control pill entirely but continue domperidone. This drop in estrogen and progesterone mimics what happens after delivery and signals the body to shift into active milk production.
Phase 2: Pumping and Expression
Once you stop the birth control pill, regular breast stimulation becomes the engine of your milk supply. A hospital-grade double electric pump is the most effective tool for this stage. Start slowly: 5 to 10 minutes per session on low suction, then gradually increase to 15 to 20 minutes per session over the first couple of weeks.
Frequency matters more than duration. Aim for at least six to eight pumping sessions per day, including at least once during the night. The Canadian Breastfeeding Foundation’s protocol suggests pumping every three hours in the early weeks. Between pumping sessions, a technique called “massage, stroke, shake” (gently massaging the breast, stroking toward the nipple, then shaking the breast while leaning forward) can help stimulate additional letdown.
You may see nothing at all for the first days or even weeks. Small drops are a good sign. The volume builds gradually, and the timeline varies widely from person to person. Consistent, frequent stimulation is the single most important factor in building supply.
Herbal Supplements
Some people add herbal galactagogues (substances believed to support milk production) once pumping begins. Fenugreek seed and blessed thistle are the two most commonly used. A typical suggested dose for fenugreek is 570 to 610 mg capsules taken three times a day, often alongside blessed thistle at a similar frequency. Fenugreek tea, about 200 ml three times daily, is another option.
The evidence behind these herbs is limited. The Academy of Breastfeeding Medicine notes that current data are insufficient to make definitive recommendations about herbal galactagogues. The studies that exist tend to be small and lack proper controls. That said, many lactation consultants include them as part of an overall protocol, and side effects are generally mild. Fenugreek can cause a maple syrup smell in sweat and urine, and it may lower blood sugar in people with diabetes.
The Role of Domperidone
Domperidone is central to most induced lactation protocols because it reliably raises prolactin levels. It was originally developed as an anti-nausea medication, and increased prolactin is technically a side effect, but it’s the reason lactation specialists prescribe it. Most protocols recommend continuing domperidone throughout the entire breastfeeding period, not just during preparation.
Availability depends on where you live. Domperidone is widely prescribed in Canada, Australia, the UK, and much of Europe. In the United States, it is not FDA-approved for any use in humans, and distributing domperidone-containing products for human use is generally illegal. The FDA has issued warnings in 2004 and 2012 about cardiac risks, including irregular heartbeat, cardiac arrest, and sudden death. A 2023 FDA review also identified neuropsychiatric effects (anxiety, insomnia, intrusive thoughts) associated with stopping domperidone suddenly after using it for lactation.
The cardiac risk appears highest in people over 60 and at daily doses above 30 mg, though lactation protocols routinely use higher doses in younger, healthy individuals. People with existing heart conditions, electrolyte imbalances, or those taking certain medications that affect heart rhythm face increased risk. If you are working with a prescriber on domperidone, they should review your cardiac history and any interacting medications beforehand. Tapering off gradually rather than stopping abruptly is important for avoiding withdrawal effects.
In the U.S., where domperidone is unavailable, some providers suggest metoclopramide as an alternative. It works through a similar mechanism but crosses into the brain more readily, which means it carries a higher risk of mood changes and fatigue.
Protocols for Transgender Women
Transgender women who have been on feminizing hormone therapy already have a foundation of estrogen and progesterone exposure. The same three-phase framework applies: hormonal priming, prolactin promotion, and hormone withdrawal with expression. However, the specifics look different because the starting hormone regimen is already in place.
During the stimulation phase, estrogen may be gradually increased to 8 to 12 mg daily and progesterone to 400 mg daily, as tolerated. High-dose estrogen does carry an increased risk of blood clots, which should be discussed with a prescriber. Once the expression phase begins (ideally about a month before the baby needs to be fed), estrogen and progesterone are reduced. Some protocols lower estrogen dramatically, down to a 0.025 mg estradiol patch, to create the sharp hormonal drop that triggers active milk production.
Pumping during this phase follows the same guidance: 5 to 10 minutes, six to eight times per day, gradually increasing. The only published case report of successful induced lactation in a transgender woman used domperidone alongside this hormonal approach.
What to Realistically Expect
Most people who induce lactation produce some milk, but a full supply (enough to exclusively breastfeed) is not guaranteed. Many use supplemental feeding systems, which deliver formula or donor milk through a thin tube taped to the breast so the baby can nurse and stimulate milk production simultaneously. This setup lets you breastfeed even if your volume is low, and the continued suckling helps build supply over time.
The composition of induced milk is very similar to milk produced after pregnancy. It contains the same immune factors, fats, and proteins. Volume is the main variable, and it depends on how long you were able to do hormonal preparation, how consistently you pumped, and individual biological variation in breast tissue development.
Working with a lactation consultant who has experience with induced lactation makes a significant difference. The process requires troubleshooting, emotional support, and sometimes medication adjustments that are hard to navigate alone. Organizations like the Canadian Breastfeeding Foundation and the International Breastfeeding Centre maintain detailed protocols and provider resources.