The 2006 Consensus statement on the management of intersex disorders states that individuals with 17β-hydroxysteroid dehydrogenase III deficiency have an intermediate risk of germ cell malignancy, at 28%, recommending that gonads be monitored. A 2010 review put the risk of germ cell tumors at 17%.

The management of 17β-hydroxysteroid dehydrogenase III deficiency can consist, according to one source, of the elimination of gonads prior to puberty, in turn halting masculinization.

Hewitt and Warne state that, children with 17β-hydroxysteroid dehydrogenase III deficiency who are raised as girls often later identify as male, describing a "well known, spontaneous change of gender identity from female to male" that "occurs after the onset of puberty." A 2005 systematic review of gender role change identified the rate of gender role change as occurring in 39–64% of individuals with 17β-hydroxysteroid dehydrogenase III deficiency raised as girls.

Males and females may be treated with hormone replacement therapy (i.e., with androgens and estrogens, respectively), which will result in normal sexual development and resolve most symptoms. In the case of 46,XY (genetically male) individuals who are phenotypically female and/or identify as the female gender, they should be treated with estrogens instead. Removal of the undescended testes should be performed in 46,XY females to prevent their malignant degeneration, whereas in 46,XY males surgical correction of the genitals is generally required, and, if necessary, an orchidopexy (relocation of the undescended testes to the scrotum) may be performed as well. Namely in genetic females presenting with ovarian cysts, GnRH analogues may be used to control high FSH and LH levels if they are unresponsive to estrogens.

17β-Hydroxysteroid dehydrogenase III deficiency is a rare disorder of sexual development, or intersex condition, affecting testosterone biosynthesis by 17β-hydroxysteroid dehydrogenase III (17β-HSD III), which can produce impaired virilization (historically termed male pseudohermaphroditism) of genetically male infants and children and excessive virilization of female adults. It is an autosomal recessive condition and is one of the few disorders of sexual development that can affect the primary and/or secondary sex characteristics of both males and females.

Diagnosis of cortisone reductase deficiency is done through analysis of cortisol to cortisone metabolite levels in blood samples. As of now, there is no treatment for cortisone reductase deficiency. Shots of cortisol are quickly metabolised into cortisone by the dysregulated 11β-HSD1 enzyme; however, symptoms can be treated. Treatment of hyperandroginism can be done through prescription of antiandrogens. They do so by inhibiting the release of gonadotropin and luteinizing hormone, both hormones in the pituitary, responsible for the production of testosterone.

Some of the childhood management issues are similar those of 21-hydroxylase deficiency:

- Replacing mineralocorticoid with fludrocortisone

- Suppressing DHEA and replacing cortisol with glucocorticoid

- Providing extra glucocorticoid for stress

- Close monitoring and perhaps other adjunctive measures to optimize growth

- Deciding whether surgical repair of virilized female genitalia is warranted

However, unlike 21-hydroxylase CAH, children with 3β-HSD CAH may be unable to produce adequate amounts of testosterone (boys) or estradiol (girls) to effect normal pubertal changes. Replacement testosterone or estrogen and progesterone can be initiated at adolescence and continued throughout adult life. Fertility may be impaired by the difficulty of providing appropriate sex hormone levels in the gonads even though the basic anatomy is present.

Isolated 17,20-lyase deficiency is caused by genetic mutations in the gene "CYP17A1", which encodes for 17,20-lyase, while not affecting 17α-hydroxylase, which is encoded by the same gene.

Observed physiological abnormalities of the condition include markedly elevated serum levels of progestogens such as progesterone and 17α-hydroxyprogesterone (due to upregulation of precursor availability for androgen and estrogen synthesis), very low or fully absent peripheral concentrations of androgens such as dehydroepiandrosterone (DHEA), androstenedione, and testosterone and estrogens such as estradiol (due to the lack of 17,20-lyase activity, which is essential for their production), and high serum concentrations of the gonadotropins, follicle-stimulating hormone (FSH) and luteinizing hormone (LH) (due to a lack of negative feedback on account of the lack of sex hormones).

Hypertension and mineralocorticoid excess is treated with glucocorticoid replacement, as in other forms of CAH.

Most genetic females with both forms of the deficiency will need replacement estrogen to induce puberty. Most will also need periodic progestin to regularize menses. Fertility is usually reduced because egg maturation and ovulation is poorly supported by the reduced intra-ovarian steroid production.

The most difficult management decisions are posed by the more ambiguous genetic (XY) males. Most who are severely undervirilized, looking more female than male, are raised as females with surgical removal of the nonfunctional testes. If raised as males, a brief course of testosterone can be given in infancy to induce growth of the penis. Surgery may be able to repair the hypospadias. The testes should be salvaged by orchiopexy if possible. Testosterone must be replaced in order for puberty to occur and continued throughout adult life.

Treatment of HH is usually with hormone replacement therapy, consisting of androgen and estrogen administration in males and females, respectively.

Congenital adrenal hyperplasia due to 3β-hydroxysteroid dehydrogenase deficiency is an uncommon form of congenital adrenal hyperplasia (CAH) resulting from a mutation in the gene for one of the key enzymes in cortisol synthesis by the adrenal gland, 3β-hydroxysteroid dehydrogenase (3β-HSD) type II (HSD3B2). As a result, higher levels of 17OH-pregnenolone appear in the blood with adrenocorticotropic hormone (ACTH) challenge, which stimulates adrenal corticosteroid synthesis.

There is a wide spectrum of clinical presentations of 3β-HSD CAH, from mild to severe forms. The uncommon severe form results from a complete loss of enzymatic activity and manifests itself in infancy as salt wasting due to the loss of mineralocorticoids. Milder forms resulting from incomplete loss of 3β-HSD type II function do not present with adrenal crisis, but can still produce virilization of genetically female infants and undervirilization of genetically male infants. As a result, this form of primary hypoadrenalism is the only form of CAH that can cause ambiguous genitalia in both genetic sexes.

Treatment of all forms of CAH may include any of:

1. supplying enough glucocorticoid to reduce hyperplasia and overproduction of androgens or mineralocorticoids

2. providing replacement mineralocorticoid and extra salt if the person is deficient

3. providing replacement testosterone or estrogen at puberty if the person is deficient

4. additional treatments to optimize growth by delaying puberty or delaying bone maturation

All of these management issues are discussed in more detail in congenital adrenal hyperplasia due to 21-hydroxylase deficiency.

Dexamethasone is used as an off-label early pre-natal treatment for the symptoms of CAH in female fetuses, but it does not treat the underlying congenital disorder. A 2007 Swedish clinical trial found that treatment may cause cognitive and behavioural defects, but the small number of test subjects means the study cannot be considered definitive. A 2012 American study found no negative short term outcomes, but "lower cognitive processing in CAH girls and women with long-term DEX exposure." Administration of pre-natal dexamethasone has been the subject of controversy over issues of informed consent and because treatment must predate a clinical diagnosis of CAH in the female fetus, especially because in utero dexamethasone may cause metabolic problems that are not evident until later in life; Swedish clinics ceased recruitment for research in 2010.

The treatment has also raised concerns in LGBT and bioethics communities following publication of an essay posted to the forum of the Hastings Center, and research in the Journal of Bioethical Inquiry, which found that pre-natal treatment of female fetuses was suggested to prevent those fetuses from becoming lesbians after birth, may make them more likely to engage in "traditionally" female-identified behaviour and careers, and more interested in bearing and raising children. Citing a known attempt by a man using his knowledge of the fraternal birth order effect to avoid having a homosexual son by using a surrogate, the essayists (Professor Alice Dreger of Northwestern University's Feinberg School of Medicine, Professor Ellen Feder of American University and attorney Anne Tamar-Mattis) suggest that pre-natal "dex" treatments constitute the first known attempt to use "in utero" protocols to reduce the incidence of homosexuality and bisexuality in humans. Research on the use of prenatal hormone treatments to prevent homosexuality stretches back to the early 1990s or earlier.

Since CAH is a recessive gene, both the mother and father must be recessive carriers of CAH for a child to have CAH. Due to advances in modern medicine, those couples with the recessive CAH genes have an option to prevent CAH in their offspring through preimplantation genetic diagnosis (PGD). In PGD, the egg is fertilized outside the women's body in a petri dish (IVF). On the 3rd day, when the embryo has developed from one cell to about 4 to 6 cells, one of those cells is removed from the embryo without harming the embryo. The embryo continues to grow until day 5 when it is either frozen or implanted into the mother. Meanwhile, the removed cell is analyzed to determine if the embryo has CAH. If the embryo is determined to have CAH, the parents may make a decision as to whether they wish to have it implanted in the mother or not.

Meta-analysis of the studies supporting the use of dexamethasone on CAH at-risk fetuses found "less than one half of one percent of published 'studies' of this intervention were regarded as being of high enough quality to provide meaningful data for a meta-analysis. Even these four studies were of low quality" ... "in ways so slipshod as to breach professional standards of medical ethics" and "there were no data on long-term follow-up of physical and metabolic outcomes in children exposed to dexamethasone".

In terms of treatment for short-chain acyl-CoA dehydrogenase deficiency, some individuals may not need treatment, while others might follow administration of:

- Riboflavin

- Dextrose

- Anticonvulsants

This disorder, epidemiologically speaking, is thought to affect approximately 1 in 50,000 newborns according to Jethva, et al. While in the U.S. state of California there seems to be a ratio of 1 in 35,000.

Congenital adrenal hyperplasia (CAH) are any of several autosomal recessive diseases resulting from mutations of genes for enzymes mediating the biochemical steps of production of mineralocorticoids, glucocorticoids or sex steroids from cholesterol by the adrenal glands (steroidogenesis).

Most of these conditions involve excessive or deficient production of sex steroids and can alter development of primary or secondary sex characteristics in some affected infants, children, or adults.

In 2009, Monash Children's Hospital at Southern Health in Melbourne, Australia reported that a patient known as Baby Z became the first person to be successfully treated for molybdenum cofactor deficiency type A. The patient was treated with cPMP, a precursor of the molybdenum cofactor. Baby Z will require daily injections of cyclic pyranopterin monophosphate (cPMP) for the rest of her life.

Current research suggests that nearly 8% of the population has at least partial DPD deficiency. A diagnostics determination test for DPD deficiency is available and it is expected that with a potential 500,000 people in North America using 5-FU this form of testing will increase. The whole genetic events affecting the DPYD gene and possibly impacting on its function are far from being elucidated, and epigenetic regulations could probably play a major role in DPD deficiency. It seems that the actual incidence of DPD deficiency remains to be understood because it could depend on the very technique used to detect it. Screening for genetic polymorphisms affecting the "DPYD" gene usually identify less than 5% of patients bearing critical mutations, whereas functional studies suggest that up to 20% of patients could actually show various levels of DPD deficiency.

Women could be more at risk than men. It is more common among African-Americans than it is among Caucasians.

Cortisol inhibition, and as a result, excess androgen release can lead to a variety of symptoms. Other symptoms come about as a result of increased levels of circulating androgen. Androgen is a steroid hormone, generally associated with development of male sex organs and secondary male sex characteristics The symptoms associated with Cortisone Reductase Deficiency are often linked with Polycystic Ovary Syndrome (PCOS) in females. The symptoms of PCOS include excessive hair growth, oligomenorrhea, amenorrhea, and infertility. In men, cortisone reductase deficiency results in premature pseudopuberty, or sexual development before the age of nine.

Congenital adrenal hyperplasia due to 17α-hydroxylase deficiency is an uncommon form of congenital adrenal hyperplasia resulting from a defect in the gene CYP17A1, which encodes for the enzyme 17α-hydroxylase. It produces decreased synthesis of both cortisol and sex steroids, with resulting increase in mineralocorticoid production. Thus, common symptoms include mild hypocortisolism, ambiguous genitalia in genetic males or failure of the ovaries to function at puberty in genetic females, and hypokalemic hypertension (respectively). However, partial (incomplete) deficiency is notable for having inconsistent symptoms between patients, and affected genetic (XX) females may be wholly asymptomatic except for infertility.

An inborn error of steroid metabolism is an inborn error of metabolism due to defects in steroid metabolism.

A variety of conditions of abnormal steroidogenesis exist due to genetic mutations in the steroidogenic enzymes involved in the process, of which include:

- 18,20-Desmolase (P450scc) deficiency: blocks production of all steroid hormones from cholesterol

- 3β-Hydroxysteroid dehydrogenase type 2 deficiency: impairs progestogen and androgen metabolism; prevents the synthesis of estrogens, glucocorticoids, and mineralocorticoids; causes androgen deficiency in males and androgen excess in females

- Combined 17α-hydroxylase/17,20-lyase deficiency: impairs progestogen metabolism; prevents androgen, estrogen, and glucocorticoid synthesis; causes mineralocorticoid excess

- Isolated 17,20-lyase deficiency: prevents androgen and estrogen synthesis

- 21-Hydroxylase deficiency: prevents glucocorticoid and mineralocorticoid synthesis; causes androgen excess in females

- 11β-Hydroxylase type 1 deficiency: impairs glucocorticoid and mineralocorticoid metabolism; causes glucocorticoid deficiency and mineralocorticoid excess as well as androgen excess in females

- 11β-Hydroxylase type 2 deficiency: impairs corticosteroid metabolism; results in excessive mineralocorticoid activity

- 18-Hydroxylase deficiency: impairs mineralocorticoid metabolism; results in mineralocorticoid deficiency

- 18-Hydroxylase overactivity: impairs mineralocorticoid metabolism; results in mineralocorticoid excess

- 17β-Hydroxysteroid dehydrogenase deficiency: impairs androgen and estrogen metabolism; results in androgen deficiency in males and androgen excess and estrogen deficiency in females

- 5α-Reductase type 2 deficiency: prevents the conversion of testosterone to dihydrotestosterone; causes androgen deficiency in males

- Aromatase deficiency: prevents estrogen synthesis; causes androgen excess in females

- Aromatase excess: causes excessive conversion of androgens to estrogens; results in estrogen excess in both sexes and androgen deficiency in males

In addition, several conditions of abnormal steroidogenesis due to genetic mutations in "receptors", as opposed to enzymes, also exist, including:

- Gonadotropin-releasing hormone (GnRH) insensitivity: prevents synthesis of sex steroids by the gonads in both sexes

- Follicle-stimulating (FSH) hormone insensitivity: prevents synthesis of sex steroids by the gonads in females; merely causes problems with fertility in males

- Luteinizing hormone (LH) insensitivity: prevents synthesis of sex steroids by the gonads in males; merely causes problems with fertility in females

- Luteinizing hormone (LH) oversensitivity: causes androgen excess in males, resulting in precocious puberty; females are asymptomatic

No activating mutations of the GnRH receptor in humans have been described in the medical literature, and only one of the FSH receptor has been described, which presented as asymptomatic.

Management for mitochondrial trifunctional protein deficiency entails the following:

- Avoiding factors that might precipitate condition

- Glucose

- Low fat/high carbohydrate nutrition

The life expectancy of patients with homocystinuria is reduced only if untreated. It is known that before the age of 30, almost one quarter of patients die as a result of thrombotic complications (e.g., heart attack).

Carnitor - an L-carnitine supplement that has shown to improve the body's metabolism in individuals with low L-carnitine levels. It is only useful for Specific fatty-acid metabolism disease.

Low-protein food is recommended for this disorder, which requires food products low in particular types of amino acids (e.g., methionine).

A 1994 study of the entire population of New South Wales (Australia) found 20 patients. Of these, 5 (25%) had died at or before 30 months of age. Of the survivors, 1 (5%) was severely disabled and the remainder had either suffered mild disability or were making normal progress in school. A 2006 Dutch study followed 155 cases and found that 27 individuals (17%) had died at an early age. Of the survivors, 24 (19%) suffered from some degree of disability, of which most were mild. All the 18 patients diagnosed neonatally were alive at the time of the follow-up.

A 2001 study followed up on 50 patients. Of these 38% died in childhood while the rest suffered from problems with morbidity.

The prevalence of Molybdenum co-factor deficiency is estimated as being between 1 in 100 000 and 1 in 200 000. To date more than 100 cases have been reported. However, this may significantly under represent cases.