The transgender woman, who wasn't identified in the report, told doctors at Mount Sinai's Center for Transgender Medicine and Surgery in New York City that her pregnant partner wasn't interested in breastfeeding, but she was.
"In some circumstances, modest but functional lactation can be induced in transgender women", authors of the study, Tamar Reisman and Zil Goldstein from the Mount Sinai Centre for Transgender Medicine and Surgery in NY, concluded in the results. The doctors devised an experimental treatment, consisting of hormones, a nausea drug, and breast stimulation, that she underwent for three-and-a-half months before the birth.
The transgender patient had undergone no gender-affirming surgeries like breast augmentation, orchiectomy, or vaginoplasty prior to his attempt to breastfeed. "Many transgender women are looking to have as numerous experiences of non-transgender women as they can, so I can see this will be extremely popular", he said. The US Food and Drug Administration warns against using domperidone as a milk production stimulant because of its unknown effects on infants, and "its association with cardiac arrhythmias, cardiac arrest, and sudden death".
The results of the case explain that a 30-year-old transgender woman received "feminizing hormone therapy" for years in a clinic. She was also using a breast pump to be able to produce at least eight ounces of milk per day. The baby was born two weeks later.More news: Facial recognition systems biased toward white men
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At six weeks, the woman started supplementing with formula because of volume concerns, the authors said.
Speaking to Daily Mail Online, the patient's doctor Tamar Reisman, MD, said the milestone was a breakthrough for transgender medicine, adding: 'We are happy that the patient shared her experience with us, and we are happy to help our patients build happy, healthy, transgender families'.
"It's out there on internet forums, but there's a lot on the internet that's true or untrue to varying degrees", Assoc Prof Safer told New Scientist. "This is a very big deal". She also has a 6-month old baby and can empathize with the desire to breastfeed but inducing lactation was something she would think twice about.
The patient, who has not been named, chose to try and breastfeed their child as their partner, who conceived, decided that they did not want to. "This is not transgender women taking control of their bodies, this is something that needs to be explored more", she said as quoted by the New Scientist.
"We wouldn't expect spironolactone to get into the breast milk", Thomas said.