Becoming a wet nurse today means providing your breast milk to feed someone else’s infant, either by directly nursing or by pumping and sharing milk. The role looks different than it did historically. Most modern wet nursing happens through milk donation programs, informal milk-sharing networks, or private arrangements with families. There’s no single certification or license required, but the process involves meeting health standards, maintaining a reliable milk supply, and understanding the legal landscape.
What Modern Wet Nursing Looks Like
Traditional wet nursing, where one person directly breastfeeds another’s baby, still exists but is relatively uncommon. More often, the modern equivalent involves pumping breast milk and providing it to families who need it. Some parents hire a wet nurse privately for direct nursing, particularly in cultures where this remains a common practice, but most milk sharing in the U.S. happens through milk banks or online networks like Eats on Feets and Human Milk 4 Human Babies.
The demand is real. Premature and medically fragile infants benefit significantly from human milk, and not every parent can produce enough. Donor milk from accredited milk banks is prioritized for hospitalized newborns, while community milk sharing fills gaps for healthy infants whose parents can’t breastfeed or don’t produce sufficient milk.
Health Screening You’ll Need to Pass
Any reputable milk bank or informed family will expect you to meet specific health criteria before accepting your milk. The Human Milk Banking Association of North America (HMBANA) maintains the most widely recognized screening standards, and even informal arrangements typically borrow from them.
You will be permanently or temporarily deferred if you:
- Test positive for HIV, HTLV, hepatitis B or C, or syphilis
- Smoke or use tobacco products
- Use recreational drugs, including cannabis and CBD products
- Take certain medications, particularly chemotherapy drugs, anticonvulsants, ergot alkaloids, lithium, and radiopharmaceuticals
- Have had a recent blood transfusion or organ/tissue transplant
- Engage in at-risk sexual practices as defined by blood bank screening criteria
Alcohol consumption requires a temporary deferral period after drinking, not a permanent exclusion. Herbal supplements and non-approved medications also require review, since many compounds pass into breast milk even in small amounts.
Screening typically involves a health questionnaire, blood tests for infectious diseases, and sometimes a physician’s clearance. If you’re working with a milk bank, they handle the testing. For private arrangements, you and the receiving family would need to coordinate testing independently.
Building or Maintaining Your Milk Supply
If you’re already breastfeeding your own child and producing more than your baby needs, you’re in the simplest position. Many wet nurses and milk donors start here, freezing surplus milk and eventually connecting with families or milk banks.
To maintain a supply large enough to feed an additional baby, frequency matters more than anything else. The CDC recommends pumping as often as the recipient baby drinks, because your body calibrates production to demand. For most infants, that means 8 to 12 sessions per day in the early months, tapering to 6 to 8 as the baby grows. If you’re struggling to produce enough, adding an extra pumping session can help signal your body to increase output.
Feeding two babies (your own and a recipient) requires serious caloric intake. Most lactating people need an additional 400 to 500 calories per day per baby, along with adequate hydration. You’ll also want a reliable double electric pump and enough storage bags or containers to build a freezer supply.
Inducing Lactation Without Pregnancy
It is possible to produce breast milk without having been pregnant, though the process is more complex and requires medical guidance. Induced lactation protocols use a combination of hormones and a medication called domperidone, which stimulates prolactin (the hormone that triggers milk production).
The Newman-Goldfarb protocol, one of the most referenced approaches, starts with estrogen and progesterone to mimic pregnancy’s effect on breast tissue. These hormones are then reduced to simulate birth, while domperidone is introduced at 10 mg four times daily and gradually increased to 20 mg four times daily. Throughout the process, regular breast pump stimulation trains the body to produce and release milk.
This process takes weeks to months, and the volume of milk produced through induction is typically lower than what someone produces after pregnancy. Domperidone is not FDA-approved in the United States, which limits access, though it is available in Canada and many other countries. Anyone pursuing induced lactation should work with a healthcare provider experienced in lactation.
Where to Connect With Families
You have three main routes for providing your milk to others.
Accredited milk banks: HMBANA-affiliated banks accept donor milk, pasteurize it, test it, and distribute it primarily to neonatal intensive care units. You won’t be paid (these are nonprofit operations), but the screening and safety infrastructure is the most rigorous available. The milk bank handles matching your milk to babies who need it.
Community milk-sharing networks: Organizations like Eats on Feets and Human Milk 4 Human Babies operate through social media, connecting donors directly with local families. These networks provide educational resources and safety guidelines (Eats on Feets promotes what they call the “4 Pillars of Safe Milksharing”), but the actual screening is between you and the receiving family. This is considered informal sharing, and the AAP has noted that it may carry infectious risks and potential contamination that pasteurized bank milk avoids.
Private arrangements: Some families specifically seek a wet nurse for direct breastfeeding, often found through word of mouth, parenting communities, or specialized agencies. These arrangements sometimes involve compensation and are essentially private contracts. The terms, including pay, schedule, health testing, and dietary expectations, are negotiated between you and the family.
Legal Considerations in the U.S.
Selling breast milk is not illegal under federal law. Human milk falls outside the National Organ Transplant Act because it’s classified as a replenishable body fluid, similar to hair or sperm. Many states also exclude self-replicating tissues from their laws restricting the sale of bodily materials.
That said, the regulatory landscape is essentially a gray area. The informal sale of breast milk is not regulated by the federal government or any state government. States like California, New York, and Texas have laws governing the procurement and distribution of human milk, but these apply only to licensed milk banks, not to individual sellers.
There are two important exceptions. If you know you have a communicable disease that transfers through breast milk (HIV, tuberculosis, syphilis) and sell your milk without disclosing this, you could face criminal liability under federal and state law. You could also be liable under federal law for shipping adulterated products, meaning milk that has been diluted or contaminated.
A Tennessee bill in 2010 attempted to make informal milk sales a misdemeanor, but it never made it out of committee. No state has successfully passed similar legislation since. Still, if you’re entering a paid arrangement, a written agreement outlining health testing, liability, and expectations protects both you and the family.
What Recipient Families Should Know About Your Milk
One detail worth understanding: the nutritional profile of donor milk differs slightly from milk a birth parent produces for their own baby, especially for premature infants. Donor milk tends to be lower in protein, sodium, potassium, zinc, and chloride compared to the milk a preterm baby’s own parent would produce. Calorie, carbohydrate, calcium, and vitamin D content are generally comparable. For full-term healthy babies, these differences are minimal. For preterm infants, hospitals often fortify donor milk to bridge the gap.
This matters because families may ask you questions about your milk’s composition, and the honest answer is that breast milk varies based on your stage of lactation, diet, time of day, and how long the milk has been stored. Freshly expressed milk retains more bioactive components than milk that has been frozen and thawed, and pasteurized bank milk loses some immune factors during processing. If you’re providing milk directly or as fresh-frozen, the recipient baby gets the fullest nutritional and immunological benefit.
Daily Life as a Wet Nurse
The practical reality of wet nursing is demanding. If you’re pumping for another family while also feeding your own child, you’re looking at a significant time commitment: each pumping session takes 15 to 30 minutes, and you may be doing this 8 or more times a day. You’ll need to store milk safely (breast milk lasts about 4 days in the refrigerator and 6 to 12 months in a deep freezer), label it clearly, and coordinate delivery or pickup with the family.
If you’re directly nursing another person’s baby, the logistics shift toward scheduling. You’ll need to be physically present for feedings or live with or near the family. Some wet nurses in private arrangements work on a live-in basis, while others come to the family’s home for specific feeding times.
Dietary restrictions are common in both formal and informal arrangements. Most families and milk banks expect you to avoid alcohol entirely or observe a waiting period after any consumption. You’ll likely be asked to limit caffeine, avoid certain fish high in mercury, and disclose any medications or supplements you take. Staying well-nourished and hydrated isn’t optional; it directly affects both your supply and the quality of your milk.