Female Development

Issues of Concern

Sexual development may become a source of concern for individuals whose development does not follow typical patterns or who experience distress regarding their external genitalia. Intersex individuals are born with chromosomal, gonadal, or anatomical variations in sex characteristics.[6] Some of these patients present with ambiguous genitalia, and many undergo genital surgery shortly after birth. Such procedures may later result in malformation, pain, sexual dysfunction, scarring, urinary difficulties, and depression.

The intersex community rejects the historical term "hermaphrodite," which originated from Greek mythology, because many consider the term crude and inappropriate.[7] This patient population also experiences a higher prevalence of comorbidities. Intersexuality most commonly becomes apparent at birth but may also first present during puberty. Medical management has changed substantially in recent years. Clinicians should avoid rushing decisions regarding sex assignment because evidence regarding the long-term outcomes of assignment surgeries remains limited.[7] A trans female refers to an individual assigned male at birth who identifies as female, whereas a trans male refers to an individual assigned female at birth who identifies as male.

Transgender individuals have a gender identity that differs from the sex assigned at birth. Some transgender adolescents and adults pursue social transition, gender-affirming hormone therapy, and gender-affirming surgery, whereas others do not. Medical care should remain individualized, developmentally appropriate, and provided by clinicians familiar with current standards of care. Adolescents with persistent gender dysphoria who have entered puberty may receive GnRH agonists to pause pubertal progression following careful interprofessional assessment and patient selection.

Fertility counseling should occur before initiating interventions that may affect future reproductive potential. Fewer than 1% of the population identifies with a gender-variant identity, yet this population experiences higher rates of mental illness, suicide, reduced quality of life, and requires comprehensive medical care. Children who exhibit signs of gender dysphoria may receive prescription "puberty blockers".[8] These medications function as GnRH agonists and provide additional time before further pubertal progression. Secondary sexual characteristics may cause significant distress, while delaying puberty may also affect future fertility.[7] Gender reassignment surgery results in permanent sterility. Healthcare practitioners should thoroughly educate patients about this outcome and ensure they clearly understand the potential benefits and risks before proceeding with treatment.[7]

Clinical Significance

Infertility

One study estimates that 1 in every 7 couples in the Western world experiences infertility.[9] Infertility develops from numerous causes and may also occur spontaneously. During female reproductive development, disruption of any developmental step may impair the ability to conceive or successfully carry a pregnancy to term.[10]

Müllerian Duct Abnormalities 

Congenital Müllerian duct malformations develop when the Müllerian ducts fail to fuse, canalize, or undergo normal reabsorption. A septate uterus represents the most common Müllerian duct abnormality, followed by the bicornuate uterus and arcuate uterus.[11] A septate uterus contains a band of tissue extending from the superior uterine musculature into the endometrial cavity. A bicornuate uterus has a characteristic heart-shaped appearance with an indentation along the superior uterine fundus. An arcuate uterus features thickening of the superior uterine musculature, producing a flattened and widened uterine cavity.

A uterus didelphys, commonly referred to as a double uterus, represents the least common Müllerian duct malformation. Uterine anomalies reduce conception rates and may contribute to pregnancy complications.[11] Müllerian agenesis occurs when the uterus fails to develop. Affected patients typically have a shortened vaginal canal, absence of the cervix, and an inability to conceive despite the presence of viable oocytes.

Congenital Adrenal Hyperplasia

Congenital adrenal hyperplasia (CAH) is an autosomal recessive disorder caused by enzyme deficiencies that impair adrenal production of aldosterone, cortisol, and androgens. The condition most commonly results from 21-hydroxylase deficiency.[12] Classic forms may present during infancy with adrenal insufficiency, salt wasting, and virilization of the external genitalia in individuals with a 46,XX karyotype. Nonclassic CAH generally presents later in life and may cause premature pubarche, hirsutism, acne, menstrual irregularities, or subfertility. Less common enzyme deficiencies produce distinct hormonal patterns, including hypertension or undervirilization in individuals with a 46,XY karyotype, and require differentiation from 21-hydroxylase deficiency.[13]

Patients with nonclassic CAH do not present with ambiguous genitalia or salt wasting. Another form of CAH may result in adolescent females who fail to develop secondary sexual characteristics while developing hypertension and hypokalemia. Increased deoxycorticosterone production causes hypertension and hypokalemia, whereas absent androgen production prevents normal masculinization. Genetic analysis reveals a 46,XY karyotype, but the absence of testosterone prevents normal development of the external genitalia, resulting in a female phenotype.[14] Deficiency of 3β-hydroxysteroid dehydrogenase type 2 in females causes precocious pubarche, hirsutism, and amenorrhea. Increased androgen exposure commonly produces ambiguous genitalia at birth. Reduced aldosterone and cortisol production also occurs in affected patients.[14] Please see StatPearls' companion resource, "Congenital Adrenal Hyperplasia," for further information.

Ovarian Cyst

Ovarian cysts may develop at any stage throughout female development and aging. Most ovarian cysts are common, benign, and asymptomatic. A small proportion, however, produces estrogen. Pediatric patients with estrogen-producing ovarian cysts may experience early pubertal onset. Puberty that begins before 8 years of age in females is classified as precocious puberty. Most patients undergo observation with follow-up evaluations every 4 to 6 weeks. Surgical excision is necessary in selected cases, although most patients resolve symptoms over time without operative intervention.[15] Please see StatPearls' companion resource, "Ovarian Cyst," for further information.

Female Athlete Triad

Menstruation represents a normal component of female development. Amenorrhea, defined as the absence of monthly menstrual periods, has numerous causes, including the female athlete triad. Without appropriate intervention, this condition may profoundly affect both overall health and future fertility. The female athlete triad consists of low energy availability, menstrual dysfunction, and reduced bone density. Vigorous exercise, restrictive diets, or eating disorders often result in severe underweight status, causing energy expenditure to exceed caloric intake. Reduced body mass index and inadequate energy availability contribute to amenorrhea and delayed puberty.[16] Please see StatPearls' companion resource, "Female Athlete Triad," for further information.

Precocious Puberty

Precocious puberty refers to the onset of pubertal development earlier than expected and is classified as either central or peripheral. Central precocious puberty results from dysfunction of the hypothalamic-pituitary-gonadal axis. The underlying cause in females remains unknown in most cases but may involve cerebral malformations or tumors. GnRH agonists serve as the treatment of choice for central precocious puberty.[17]

Peripheral precocious puberty develops independently of the hypothalamic-pituitary-gonadal axis and may result from ovarian cysts, McCune-Albright syndrome, congenital adrenal hyperplasia, or exposure to exogenous hormones. Females receiving exogenous androgens or estrogen may enter puberty earlier than expected. Management of peripheral precocious puberty depends on the underlying etiology.[18] Please see StatPearls' companion resource, "Precocious Puberty," for further information.

McCune Albright Syndrome

McCune-Albright syndrome results from a spontaneous activating mutation involving the GNAS1 gene and the luteinizing hormone (LH) receptor gene.[18] This rare disorder affects the skin, bones, and endocrine system. Female patients commonly present with precocious puberty, polyostotic fibrous dysplasia of bone, and café-au-lait macules. Precocious puberty and fibrous dysplasia represent the 2 most common reasons for medical evaluation. Treatment primarily focuses on the specific manifestations present in each patient.[19]

Androgen Insensitivity Syndrome

Androgen insensitivity syndrome (AIS) results from dysfunction of androgen receptors throughout the body and represents a common disorder of sexual development. The clinical phenotype varies according to the degree of receptor dysfunction.[20] Individuals with complete AIS have an external female phenotype and gonads located within the abdomen or other ectopic locations. These patients also have a shortened vaginal canal and an absence of the uterus. Standard treatment includes gonadectomy followed by hormone replacement therapy. Gonadal removal remains essential because of the increased risk of germ cell tumors associated with retained gonads during hormone therapy.[20]

Turner Syndrome

Turner syndrome results from the complete or partial loss of an X chromosome. Genetic mosaicism occurs in most cases. Common clinical features include short stature, a webbed neck, distinctive physical characteristics, intellectual disability, and ovarian failure.[21] Short stature represents the most common concern when patients seek medical care. Growth hormone therapy, either alone or combined with oxandrolone, may improve height. Gonadal failure prevents normal female pubertal development, although hormone replacement therapy can promote pubertal development. Patients with Turner syndrome may achieve pregnancy through oocyte donation because ovarian failure prevents natural conception. One study reported that most patients have completed middle or high school.[22]

Nursing, Allied Health, and Interprofessional Team Interventions

Female development requires coordinated, patient-centered care across primary care, pediatric endocrinology, adolescent gynecology, genetics, urology, surgery, nursing, pharmacy, mental health, social work, and other allied health disciplines. Physicians and advanced practitioners identify normal and abnormal patterns of development, including precocious puberty, delayed puberty, primary amenorrhea, virilization, abnormal uterine bleeding, congenital adrenal hyperplasia, Turner syndrome, androgen insensitivity, Müllerian anomalies, and differences of sex development. Evaluation should include careful growth, pubertal, menstrual, medication, family, and psychosocial histories; developmentally appropriate physical examination; and targeted testing or referral when indicated.

Nurses support patient safety by documenting growth and pubertal progression, obtaining menstrual histories, recognizing red flags such as rapidly progressive puberty, heavy bleeding, virilization, hypertension, dehydration, or adrenal crisis symptoms, and providing education about normal pubertal variation, menstrual hygiene, medication adherence, and follow-up. Pharmacists assist with medication safety, including glucocorticoid and mineralocorticoid therapy in congenital adrenal hyperplasia, stress-dose steroid education, hormonal therapy, GnRH agonists, menstrual suppression, iron therapy, and drug-interaction review. Interprofessional care is particularly important for patients with differences of sex development, where endocrine, genetic, gynecologic, urologic, psychosocial, fertility, and ethical issues often overlap.[23][24][25][26]

Effective interprofessional care also requires clear communication, respect for patient dignity, and coordination of longitudinal follow-up. Teams should document pubertal stage, growth velocity, menstrual history, diagnostic uncertainty, test interpretation, patient and family preferences, and follow-up plans to prevent fragmented recommendations or delayed diagnosis. Mental health professionals, social workers, and child-life specialists can support patients and families facing body-image concerns, fertility implications, diagnostic uncertainty, gender dysphoria, chronic disease, or decisions about surgical timing. Ethical care includes developmentally appropriate disclosure, assent, and consent; shared decision-making; privacy; and avoidance of unnecessary irreversible interventions when medical urgency is absent. For transgender and gender-diverse adolescents, clinicians should use affirmed names and pronouns, assess mental health and safety, involve families when appropriate, and provide fertility counseling before interventions that may affect reproductive potential. Pubertal suppression or gender-affirming therapy should be considered only through individualized, interprofessional care. A coordinated team approach improves patient safety, supports informed decision-making, and helps patients transition from childhood through puberty, adolescence, and adult reproductive health care.[27][8][28][29]