started methodology

main.bib

@@ -1304,6 +1304,7 @@ For additional {GBD} results and resources, visit the {GBD} 2019 Data Resources
 	urldate = {2025-03-07},
 	date = {1992-05},
 	langid = {english},
+	file = {PDF:/home/alex/Zotero/storage/JWE75VL3/Münster et al. - 1992 - Length and variation in the menstrual cycle—a cross‐sectional study from a Danish county.pdf:application/pdf},
 }
 
 @online{pedroso_menstrual_2022,
@@ -1369,3 +1370,37 @@ For additional {GBD} results and resources, visit the {GBD} 2019 Data Resources
 	keywords = {Data processing, R (Computer program language), Time-series analysis},
 	file = {PDF:/home/alex/Zotero/storage/CIYMBUEW/Cryer and Chan - 2008 - Time series analysis with applications in R.pdf:application/pdf},
 }
+
+@article{rosenfield_adolescent_2013,
+	title = {Adolescent Anovulation: Maturational Mechanisms and Implications},
+	volume = {98},
+	issn = {0021-972X, 1945-7197},
+	url = {https://academic.oup.com/jcem/article-lookup/doi/10.1210/jc.2013-1770},
+	doi = {10.1210/jc.2013-1770},
+	shorttitle = {Adolescent Anovulation},
+	pages = {3572--3583},
+	number = {9},
+	journaltitle = {The Journal of Clinical Endocrinology \& Metabolism},
+	author = {Rosenfield, Robert L.},
+	urldate = {2025-03-17},
+	date = {2013-09},
+	langid = {english},
+	file = {PDF:/home/alex/Zotero/storage/BEF7PQT6/Rosenfield - 2013 - Adolescent Anovulation Maturational Mechanisms and Implications.pdf:application/pdf},
+}
+
+@article{murray_diagnosis_2005,
+	title = {Diagnosis and treatment of ectopic pregnancy},
+	volume = {173},
+	issn = {0820-3946, 1488-2329},
+	url = {http://www.cmaj.ca/cgi/doi/10.1503/cmaj.050222},
+	doi = {10.1503/cmaj.050222},
+	abstract = {{ECTOPIC} {PREGNANCY} {IS} A {LIFE}- {AND} {FERTILITY}-threatening condition that is commonly seen in Canadian emergency departments. Increases in the availability and use of hormonal markers, coupled with advances in formal and emergency ultrasonography have changed the diagnostic approach to the patient in the emergency department with first-trimester bleeding or pain. Ultrasonography should be the initial investigation for symptomatic women in their first trimester; when the results are indeterminate, the serum β human chorionic gonadotropin (β-{hCG}) concentration should be measured. Serial measurement of β-{hCG} and progesterone concentrations may be useful when the diagnosis remains unclear. Advances in surgical and medical therapy for ectopic pregnancy have allowed the proliferation of minimally invasive or noninvasive treatment. Guidelines for laparoscopy and for methotrexate therapy are provided.},
+	pages = {905--912},
+	number = {8},
+	journaltitle = {Canadian Medical Association Journal},
+	author = {Murray, H.},
+	urldate = {2025-03-17},
+	date = {2005-10-11},
+	langid = {english},
+	file = {PDF:/home/alex/Zotero/storage/Y73KE57K/Murray - 2005 - Diagnosis and treatment of ectopic pregnancy.pdf:application/pdf},
+}