Transgender medical advancements news and discussion

[weatheriscool]

Would it genetically possible for a biological male to be edited to form a womb instead of not doing so as hormones told it not too. This would be a vastly better solution then adapting the womb transplant tech to the male body later in life.

Yes, it is genetically possible in principle to edit a biological male (XY) embryo so that Müllerian ducts develop into a uterus/womb instead of regressing under the influence of hormones like anti-Müllerian hormone (AMH). This leverages the fact that the genetic "blueprint" for female internal reproductive structures exists in all embryos—it's just actively suppressed in XY fetuses.Quick biology recapAll early embryos (regardless of chromosomes) develop both Wolffian (male) and Müllerian (female precursor) ducts.
In XY embryos, the SRY gene on the Y chromosome triggers testes formation. The testes then produce:Testosterone (promotes male ducts and external genitalia).
AMH (from Sertoli cells), which binds AMHR2 receptors and triggers regression (breakdown) of the Müllerian ducts around weeks 7–9 of development. No AMH signaling = no womb suppression.


By disrupting this suppression pathway, the Müllerian ducts persist and differentiate into a uterus, fallopian tubes, and upper vagina—exactly as they do in XX embryos.Natural proof-of-concept: Persistent Müllerian Duct Syndrome (PMDS)This rare genetic condition in XY males demonstrates it works without any editing. Mutations in the AMH gene (on chromosome 19) or AMHR2 gene (on chromosome 12) prevent the hormone signal, so a uterus and fallopian tubes form alongside normal male external genitalia and testes.


PMDS occurs naturally via loss-of-function mutations, so the developmental program for a womb is already "on" by default in the absence of AMH signaling. The uterus in PMDS individuals is often discovered incidentally during surgery for undescended testes or hernias; it's structurally present but typically underdeveloped (hypoplastic).How gene editing could do this intentionallyCRISPR-Cas9 (or base editing) could target AMH or AMHR2 in a single-cell or early-stage XY embryo:Introduce frameshift mutations, deletions, or knockouts to mimic PMDS.
This would be germline/heritable editing (done pre-implantation, e.g., via IVF), so the change affects every cell and propagates during fetal development.
In utero or embryonic editing techniques are already being researched for other genetic diseases, and CRISPR has been used successfully in human embryos in lab settings for proof-of-concept (though not for this purpose).


Animal models (mice, etc.) confirm that knocking out AMH signaling components prevents Müllerian regression. No ethical or technical barrier prevents the same in humans at the molecular level—the pathway is highly conserved.Why this could be "vastly better" than adult womb transplants (in theory)Integrated development: The uterus would form naturally with its own blood supply, nerves, and connections during embryogenesis, rather than a later surgical graft into a male pelvis (which requires complex vascular anastomoses, hormone priming, and faces rejection/immunosuppression issues). Transplants in cisgender women are already extremely challenging; adapting them to male anatomy (different pelvis shape, no natural hormonal cycling, etc.) is even harder and remains experimental.
No post-natal surgery needed for the basic structure.
Avoids the limitations of current uterus transplant tech, which still struggles with long-term viability for pregnancy.

Major caveats—it's not a simple "flip a switch" for functional pregnancyThe resulting womb is usually rudimentary: In real PMDS cases, it's present but often non-functional for gestation. No documented cases of successful pregnancy in PMDS individuals exist; fertility is typically impaired or absent (due to issues like cryptorchidism, poor ductal connections, or hormonal environment).


Gonads remain testes: You'd still have male hormones (unless you also edit SRY or other pathways), no ovaries/eggs, and would need external hormone therapy + IVF with donor eggs/surrogacy for any pregnancy attempt. Male skeletal/pelvic anatomy would complicate carrying a pregnancy.
Technical risks of editing: Off-target mutations, mosaicism (not all cells edited), embryonic lethality, or unintended effects on other AMH roles (e.g., in gonadal development). Current embryo editing isn't precise enough for routine safe use.
Ethical and legal barriers: Human germline editing is banned or strictly restricted in most countries (post-He Jiankui controversy). This would be non-therapeutic enhancement, not disease correction.
Not full sex reversal: External genitalia and secondary characteristics would still be male unless you layered on more edits (e.g., to hormone receptors or SRY).

In short: Genetically and developmentally feasible today via targeted disruption of the AMH pathway, as proven by a real human syndrome. It would create a more "native" womb than transplants. But turning that into a reliably functional, pregnancy-capable organ in an XY body would still require enormous additional advances in hormones, surgery, and reproductive tech. It's a cool theoretical solution grounded in real biology, but far from ready for application.

How gene editing could do this intentionallyCRISPR-Cas9 (or base editing) could target AMH or AMHR2 in a single-cell or early-stage XY embryo:Introduce frameshift mutations, deletions, or knockouts to mimic PMDS.
This would be germline/heritable editing (done pre-implantation, e.g., via IVF), so the change affects every cell and propagates during fetal development.
In utero or embryonic editing techniques are already being researched for other genetic diseases, and CRISPR has been used successfully in human embryos in lab settings for proof-of-concept (though not for this purpose).

pmc.ncbi.nlm.nih.gov

Animal models (mice, etc.) confirm that knocking out AMH signaling components prevents Müllerian regression. No ethical or technical barrier prevents the same in humans at the molecular level—the pathway is highly conserved.

[weatheriscool]

GROK
Lets say the womb developed, connected to the blood flow but didn't have hormones that were counter to the ones produced by the male organs until later in life when they were added with the ivf pregnancy. Would this make it easier?

Yes, this scenario would make the process significantly easier (and more biologically plausible) than adapting adult womb transplant technology to a male body later in life. The key advantage is that the uterus develops natively during embryogenesis with its own integrated blood supply, ligaments, and pelvic positioning—exactly as in the user’s hypothetical (and as proven in real PMDS cases). Late hormone supplementation then “activates” and matures it for pregnancy, bypassing the biggest hurdles of transplants.Why native embryonic development helps enormously

In your edited XY embryo (AMH pathway disrupted), the Müllerian ducts form a uterus, fallopian tubes, and upper vagina in place, connected naturally to the bloodstream and surrounding tissues from week 7–9 onward. This avoids the massive surgical challenges of transplanting a donor uterus into an adult male pelvis (different shape, limited space, complex vascular hook-ups that often fail long-term).

nbcnews.com
PMDS (the natural equivalent) shows this works: XY males develop a structurally present (though often small) uterus with blood supply, despite male hormones. No rejection risk, no immunosuppression needed—huge win over transplants.

medlineplus.gov

Hormone mismatch during development isn’t a deal-breaker

Early exposure to testicular testosterone (and low/absent estrogen) does cause the uterus to remain hypoplastic (underdeveloped, “infantile” size)—exactly as you described and as seen in PMDS and conditions like Turner syndrome (where ovaries fail early).

pmc.ncbi.nlm.nih.gov
But uteri are highly responsive to estrogen later. In estrogen-deficient females (e.g., Turner syndrome or hypogonadism), starting estrogen HRT at puberty triggers dramatic growth, endometrial thickening, and full maturation—allowing successful IVF pregnancies.

pmc.ncbi.nlm.nih.gov +1
Androgens don’t irreversibly damage Müllerian tissue; they simply don’t support its growth the way estrogen does. The uterus retains estrogen/progesterone receptors and can cycle once female hormones are introduced.

ufhealth.org

In your timeline:

Keep testes (or suppress androgens later) until adulthood.
Add estrogen + progesterone HRT (mimicking female puberty/pregnancy prep) right before IVF.
This should enlarge the uterus, build a responsive endometrium, and support implantation/gestation—similar to how pre-pubertal uteri “catch up” with hormones.

Practical advantages over adult transplants

No graft surgery or rejection: Transplants require lifelong immunosuppression, have high complication rates (even in cis women), and face extra anatomical issues in males. Your approach uses self-tissue that grew in situ.

pmc.ncbi.nlm.nih.gov
Better long-term viability: Native blood supply and tissue integration mean more reliable hormonal responsiveness and lower risk of graft failure.
IVF timing: You’d still need donor eggs + IVF embryo transfer (no ovaries in this setup), but the uterus would already be “home-grown” and primed, not a foreign organ fighting to vascularize.

Remaining challenges (still easier than transplants, but not trivial)

Pelvic anatomy: Male pelvis is narrower/taller; pregnancy would carry higher risks of complications (preterm labor, etc.), just as in current female uterus transplants.

eujtransplantation.com
Androgen management: Testes would need suppression/orchiectomy + full female HRT to avoid counteracting estrogen effects and to enable pregnancy-safe hormone levels.
Uterine size/function: It starts small, but HRT responsiveness is well-documented in analogous cases. No PMDS pregnancies have been attempted (standard care is to remove the uterus to prevent rare malignancy), but biology supports it.

en.wikipedia.org
Other risks: Cancer surveillance in retained Müllerian tissue; potential need for fallopian tube management; ethical/regulatory hurdles for germline editing.

Bottom line: Yes—this embryonic + delayed-HRT route is vastly superior to bolting on an adult donor uterus later. It leverages the body’s own developmental program for structure, then uses proven hormone therapy for maturation. Transplants are already working in select cis women; this genetic approach would remove the hardest parts (surgery, rejection, poor integration). It’s still futuristic tech (safe embryo editing + IVF pregnancy in this setup), but biologically grounded and far more feasible than the alternative you mentioned.

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"Lets say the womb developed, connected to the blood flow but didn't have hormones that were counter to the ones produced by the male organs until later in life when they were also injected into the body as hrt with the ivf pregnancy(egg + your sperm). Would this make it easier?

Yes, that developmental scenario would make a viable pregnancy theoretically far easier to achieve than trying to transplant a donor uterus later in life. The key advantages lie in leveraging natural embryogenesis for complex anatomical structures and avoiding the massive surgical and immunological barriers inherent to transplantation.

Here is a detailed breakdown of why this approach is superior:
Why Native Embryonic Development Helps Enormously

The foundational advantage in this hypothetical scenario is that the uterus, fallopian tubes, and upper vagina develop natively during embryogenesis. By disrupting the anti-Müllerian hormone (AMH) pathway in an edited XY embryo, the Müllerian ducts are allowed to form naturally from weeks 7–9 onward.

This bypasses the massive surgical challenges of transplanting a donor uterus into an adult male.

Anatomical Integration: The uterus grows in situ, establishing its own native blood supply, ligaments, and correct positioning within the pelvic space.

No Rejection: Because it is the individual's own native tissue, there is zero risk of organ rejection. This eliminates the need for lifelong immunosuppression, a major barrier in transplants that carries high risks for both the patient and a potential pregnancy.

Hormone Mismatch During Development Is Solvable Later

The lack of early estrogen (and the presence of testosterone) during development isn't a dead end for uterine function.

In this scenario, the user described the uterus developing but not having female hormones until later in life (injected as HRT for IVF).

Development without Hormones: Early exposure to testicular testosterone (and low or absent estrogen) will likely cause the uterus to remain hypoplastic (an "infantile" size), a condition seen in conditions like Persistent Müllerian Duct Syndrome (PMDS) or Turner syndrome.

The Power of HRT: Uteri are remarkably responsive to estrogen, even later in life. Estrogen therapy, especially when introduced later to mimic puberty, triggers dramatic growth, endometrial thickening, and full maturation of the tissue. This allows successful IVF pregnancies even in individuals with hypogonadism.

No Irreversible Damage: While androgens do not support Müllerian tissue growth, they do not seem to cause irreversible damage to it. The uterus retains its estrogen and progesterone receptors, allowing it to "catch up" in size and become cyclical once the necessary female hormones are introduced.

In this timeline, one would wait until adulthood (maintaining testes or suppressing androgens later), introduce full estrogen and progesterone HRT, and then perform IVF (using a donor egg and the individual's own sperm). This timeline leverages the body's own developmental capabilities rather than trying to surgically integrate foreign tissue.
Practical Advantages over Adult Transplants

The core hurdles of transplants vanish:

No Graft Surgery: There is no incredibly complex microvascular surgery needed to connect a donor uterus to the adult pelvic blood supply.

Reduced Complications: Native integration ensures better hormonal responsiveness and a far more reliable, native blood supply, greatly reducing the risk of graft failure often seen in transplants.

Remaining (But Less Severe) Challenges

While vastly superior to transplantation, this approach is still not trivial:

Pelvic Anatomy: The narrower and taller structure of the male pelvis would still present complications, carrying risks such as preterm labor—a challenge shared with current female uterine transplants.

Androgen Management: Successful pregnancy would likely require testes suppression or orchiectomy, along with high-dose female HRT to create the hormone levels needed for pregnancy.

Unknown Uterine Response: While responsive to hormones, the full function of a naturally hypoplastic uterus is still somewhat unknown. No pregnancies have been attempted in PMDS cases, for example, as current medical practice is typically to remove the uterus.

Bottom Line

This embryonic pathway coupled with delayed-HRT is a vastly superior strategy to adult-onset uterine transplantation. It cleverly uses the body's own natural developmental program for structure and integrates it naturally, then uses established hormone therapies to achieve maturity and function. While the necessary genetic editing of embryos and IVF pregnancy in this context are still futuristic technologies, the approach is biologically grounded and avoids the hardest barriers of alternative solutions.