What does a transgender male, born female, need to do?
For transgender males, options for fertility preservation include the recommended option of cryopreservation of the eggs (oocytes), although freezing of embryos and/or ovarian tissue are also possible.
The latter would be required in a prepubertal individual if they wanted to start puberty blockers and then go straight onto cross-sex hormones, Dr. Menke noted, although she said it’s not definitively known if prepubertal ovarian tissue is capable of being stimulated in the future to produce viable mature oocytes.
In someone who has gone through puberty, the ideal time to freeze eggs is before beginning gender-affirming hormone therapy, Dr. Menke explained. This is because it is not known whether testosterone has any adverse impact on oocyte development.
“We just don’t have definitive data that long-term testosterone isn’t gonadotoxic,” she said in response to a question about this after her talk.
Assessment of the reproductive consequences of gender-affirming therapy in transgender males can also be complicated by coexisting conditions, Dr. Menke explained.
For example, up to 58% of transgender males have polycystic ovary syndrome (PCOS) prior to transitioning, she noted. PCOS itself, and/or the gender-affirming therapy, may cause histologic changes of the ovarian tissue – for example, hyperplasia of ovarian stroma – and it’s not yet known to what extent this may impact future fertility, if present, she noted.
For oocyte preservation in female-to-male transgender individuals, stimulation with gonadotropins for 2-3 weeks is needed, and the procedure is invasive, requiring repeated vaginal ultrasounds. During this period, estradiol levels are supraphysiologic, and there is potential for breast development and vaginal bleeding post-retrieval, which individuals will need to be counseled about, Dr. Menke noted.
The cost of this also needs to be factored into the equation. Depending on insurance coverage, costs may be covered – and where there is no precedent, individuals can try referring their insurance companies to the ‘oncofertility consortium access-to-care model’, Dr. Menke advised.
If there is no coverage, the average cost for one egg-freezing cycle ranges from $10,000-$17,000 in the U.S., and often two to three cycles are needed to generate sufficient oocytes to be sure of a pregnancy. In addition, there are storage costs. Plus, there will be the cost of any future intervention to achieve a pregnancy, she stressed.
How long frozen oocytes remain viable is also still a matter of scientific debate, although “as the technology changes from slow-freeze to vitrification,” this time period should lengthen, Dr. Menke said.
In transgender males who have not preserved oocytes or embryos prior to transitioning, it’s necessary to stop testosterone to have the best chance of harvesting viable gametes, Dr. Menke said. Furthermore, individuals undertaking this procedure need to take into account all of the above-mentioned side effects of egg harvesting.
Although there have been reports of successful pregnancies with eggs retrieved from transgender males who have temporarily stopped testosterone, fertilization and embryo development following discontinuation of testosterone still require “additional investigation,” she observed.
Furthermore, “there are case reports of oocyte stimulation and retrieval of mature oocytes while patients continue testosterone therapy, and this may be an option in the future,” she noted, again stressing that it’s not known if excess testosterone is gonadotoxic.
Other options for fertility preservation in the transgender male include embryo cryopreservation, but this still involves hormonal stimulation and invasive procedures and would require the use of a sperm donor in a person who doesn’t currently have a partner (or who has one, but not necessarily one with whom they want to create a child).
For transgender males there is also the possibility of using a surrogate mother for the pregnancy, she noted.