About Malorie McFarlane
Scientists aren’t sure if and how DHT affects females, but they think it may play a role in body hair and pubic hair growth. Testosterone levels may be elevated despite normal levels of luteinizing hormone. MAIS is only diagnosed in normal phenotypic males, and is not typically investigated except in cases of male infertility. Although technically a variant of MAIS, SBMA's presentation is not typical of androgen insensitivity; symptoms do not occur until adulthood and include neuromuscular defects as well as signs of androgen inaction.Missense mutations that result in a single amino acid substitution are known to produce the most phenotypic diversity. The degree of variation, however, does not appear to be constant across all AR mutations, and is much more extreme in some. Unfortunately, little information regarding phenotype can be gleaned from precise knowledge of the AR mutation itself; the same AR mutation may cause significant variation in the degree of masculinization in different individuals, even among members of the same family. Some carriers have been noted to have slightly reduced body hair, delayed puberty, and/or tall stature, presumably due to skewed X-inactivation. Several case studies of fertile 46,XY males with AIS have been published, although this group is thought to be a minority.
This means male sex development does not happen as normal. Children with AIS have XY chromosomes, but the genetic alteration they inherit prevents their body responding to testosterone (the sex hormone). Androgen insensitivity syndrome (AIS) is caused by a genetic alteration that means the body cannot respond to testosterone either completely or partially.
Testosterone is the sex hormone produced by the testicles. As such, affected individuals do not menstruate and are unable to conceive a child (infertile). It’s important to talk with your child about their AIS around the time of puberty. Sometimes, they wait until puberty to choose one. But some health experts think certain treatments, such as removal of the testicles, should happen before puberty. This gives your child’s body time to go through developmental changes. But CAIS (complete AIS) or MAIS might not be evident until the age of 11 or 12, when puberty begins.
The degree of impairment is sufficient to impair spermatogenesis and / or the development of secondary sexual characteristics at puberty in males, but does not affect genital differentiation or development. Androgen receptor proteins interact with androgen hormones, such as testosterone, and help direct male sexual development. Variants (also called mutations) in the AR gene cause androgen insensitivity syndrome. Complete androgen insensitivity syndrome affects 2 to 5 in 100,000 newborn females.
So far, some factors, as chronological age and gonadal location can influence GCTs development (41). The risk of GCTs development is related to the presence of a Y chromosome, but is not the same for the different etiologies of 46,XY DSD. The use of DHT in male PAIS has been tested (0.3 mg/kg of androstanolone gel 2.5% for 4 months) and mixed results were obtained following DHT therapy (38).
