May 2021 in “Journal of the Endocrine Society” The 18-year-old girl likely has a condition called müllerian agenesis, which caused her to not have a uterus and experience no menstrual periods.
Polycystic ovary syndrome (PCOS) affects about 10% of women, is often linked to obesity and family history, and can cause irregular periods, fertility issues, and other symptoms. It's usually managed with lifestyle changes, weight loss, and medication.
11 citations
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November 2009 in “Sports Medicine” Irregular menstrual cycles in exercising women may be linked to energy deficiency or hormonal imbalances, requiring careful diagnosis for proper treatment.
49 citations
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May 2018 in “Endocrine” Women with regular menstrual cycles and PCOS have linked kisspeptin and LH hormone patterns, unlike those with irregular cycles.
June 2020 in “Risk Management and Healthcare Policy” Drinking alcohol 1-2 times a week may reduce urinary symptoms, but drinking more often might increase the risk.
78 citations
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November 2008 in “Fertility and Sterility” Amenorrhea is relatively rare and initial testing should check FSH, TSH, and prolactin levels.
October 2010 in “Reproductive Biomedicine Online” Women with pituitary adenomas often have reproductive issues, like irregular periods and trouble getting pregnant, but not always breast milk production without pregnancy.
2 citations
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May 2006 in “Women's Health Medicine” Ovulation disorders are a major cause of infertility and menstrual problems in women.
December 2022 in “International Journal of Current Science Research and Review” Polycystic Ovary Syndrome (PCOS) is a common but often undiagnosed disorder in women that can cause irregular periods, infertility, and other symptoms, and can be managed with lifestyle changes, medication, and sometimes surgery.
July 2021 in “Journal of medical pharmaceutical and allied sciences” Amenorrhea, or missing periods, is caused by various factors and is treated based on the specific cause.
June 2022 in “Foodsci: Indian journal of research in foods and nutrition” Eating better, exercising, staying clean during periods, and learning about health can help reduce menstrual problems and improve life quality.
Exercising women with irregular periods have lower thyroid hormone levels and less body fat.
January 2026 in “Journal of Contemporary Studies in Epidemiology and Public Health” Women with PCOS often have severe PMS, but managing anemia and regular menstruation can help reduce symptoms.
December 2022 in “Journal of Pharmaceutical Negative Results” Late onset of first period and irregular development of sexual traits in teenage girls can lead to poorer reproductive health.
7 citations
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May 2024 in “Acta Obstetricia Et Gynecologica Scandinavica” Severe menstrual issues in PCOS women signal higher risk for heart and metabolic problems.
December 2022 in “International journal of preventive, curative & community medicine” PCOS is a common hormonal disorder in women, causing symptoms like acne and irregular periods, and is managed with medication and lifestyle changes.
February 2026 in “Indian Journal of Community Health” PCOS affects 21.25% of female doctors studied, with irregular periods being common, highlighting the need for better awareness and management.
77 citations
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March 2004 in “Human Reproduction” Women with irregular periods and/or excessive body hair are more likely to have polycystic ovaries, and this condition is linked to higher health risks.
April 2024 in “Women s Health Reports” Hyperandrogenemia is more significant for adolescent girls with irregular menses.
3 citations
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May 2019 in “Ginekologia Polska” Adolescents with abnormal uterine bleeding often have polycystic ovarian syndrome and insulin resistance.
August 2022 in “International journal of reproduction, contraception, obstetrics and gynecology” The study found that 7.21% of young girls have polycystic ovarian syndrome, with symptoms like irregular periods, abnormal hair growth, and acne. Early diagnosis is important to prevent long-term complications.
May 2021 in “Journal of the Endocrine Society” A 23-year-old woman's missed periods were caused by a rare genetic disorder treated with hormone patches.
1947 citations
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September 1995 in “New England journal of medicine/The New England journal of medicine” PCOS is a common hormonal disorder causing irregular periods and increased hair growth, linked to insulin resistance and long-term health issues.
February 2026 in “Research Society and Development” PCOS is a common disorder in women causing symptoms like irregular periods and infertility, and requires early diagnosis and treatment.
66 citations
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August 1999 in “The Journal of Clinical Endocrinology & Metabolism” Women with acromegaly often have irregular periods due to hormone imbalances and growth hormone effects.
November 2018 in “International Journal of Current Pharmaceutical Research” PCOS is a hormonal disorder causing symptoms like irregular periods and acne, and increases the risk of diabetes and heart disease.
1 citations
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July 2025 in “Journal of Chemical Biological and Physical Sciences” Women with PCOS have shorter reproductive periods and higher infertility rates compared to healthy women.
5 citations
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February 2020 in “Journal of pediatric & adolescent gynecology” Recurrent vaginal bleeding in young girls without puberty signs may require a genital exam to find hidden causes.
3 citations
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November 2022 in “International journal of environmental research and public health/International journal of environmental research and public health” Ethnic Indian women with PCOS often have early symptoms, delayed diagnosis, and need better information and support for treatment and lifestyle management.
January 2020 in “International journal of current research and review” Exposure to plastics may increase the risk of irregular menstrual cycles and symptoms of hormone imbalance in teenage girls.