<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0300-9041</journal-id>
<journal-title><![CDATA[Ginecología y obstetricia de México]]></journal-title>
<abbrev-journal-title><![CDATA[Ginecol. obstet. Méx.]]></abbrev-journal-title>
<issn>0300-9041</issn>
<publisher>
<publisher-name><![CDATA[Federación Mexicana de Colegios de Obstetricia y Ginecología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0300-90412022000500407</article-id>
<article-id pub-id-type="doi">10.24245/gom.v90i5.7532</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Percepción de cambios en el ciclo menstrual posteriores a la vacunación contra SARS-CoV-2]]></article-title>
<article-title xml:lang="en"><![CDATA[Perception of menstrual cycle changes following SARS-CoV-2 vaccination.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Schulte]]></surname>
<given-names><![CDATA[Alejandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Aranda]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Olavarría-Guadarrama]]></surname>
<given-names><![CDATA[Mónica Yazmín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Chávez]]></surname>
<given-names><![CDATA[Shamar Alexandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Trujillo- Rangel]]></surname>
<given-names><![CDATA[Walter Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kably-Ambe]]></surname>
<given-names><![CDATA[Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Ángeles Lomas  ]]></institution>
<addr-line><![CDATA[Huixquilucan Estado de México]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Guadalajara  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Guadalajara  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Guadalajara  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Hospital Ángeles Lomas  ]]></institution>
<addr-line><![CDATA[Huixquilucan Estado de México]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<volume>90</volume>
<numero>5</numero>
<fpage>407</fpage>
<lpage>416</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0300-90412022000500407&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0300-90412022000500407&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0300-90412022000500407&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  OBJETIVO: Identificar si la vacunación contra la COVID-19 se asocia con cambios en el patrón menstrual.  MATERIALES Y MÉTODOS:  Estudio observacional y transversal anónimo efectuado entre el 4 y 29 de octubre del 2021 en un grupo de mujeres que completaron un cuestionario elaborado para saber si hubo cambios en el ciclo menstrual posteriores a la vacunación. La encuesta se aplicó durante un periodo de cuatro semanas. Para el análisis estadístico se utilizó el programa SPSS. Los cambios antes y después de la aplicación de la primera y segunda dosis de la vacuna contra COVID-19 se evaluaron con una prueba t de muestras pareadas y &#967;2.  RESULTADOS: Se reunieron 4501 pacientes de las que se excluyeron 1815 por no cumplir con los criterios de inclusión; al final quedaron para el análisis 2686. De éstas el 37.9% (n = 1018) tuvieron cambios en el ciclo menstrual posteriores a la vacunación contra COVID-19; en 61.8% (n = 630) fueron en la cantidad del sangrado. De las mujeres que reportaron cambios en el ciclo menstrual, el 64.34% (n = 655) fueron posteriores a la aplicación de vacunas tipo ARN mensajero (35.06%; p = 0.19, IC95%: -0.35-0.19). En relación con la cantidad de dosis aplicadas 72.10% (n = 734) reportaron modificaciones en el ciclo menstrual después de la segunda vacuna (p = 0.01, IC95%: 0.58-0.98).  CONCLUSIONES: La vacunación contra COVID-19 se asocia con pequeños cambios en el ciclo menstrual, sin significación estadística. Las mujeres que reciben dos dosis de la vacuna tuvieron cambios en la cantidad del sangrado.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  OBJECTIVE: Identify whether vaccination against COVID-19 is associated with changes in menstrual pattern.  MATERIALS AND METHODS: An anonymous observational, cross-sectional to be held from October 4 to 29, 2021 was conducted in a group of women who completed a questionnaire designed to inquire about changes in the menstrual cycle following vaccination. The survey was administered over a four-week period. SPSS software was used for statistical analysis. Changes before and after the application of the first and second doses of COVID-19 vaccine were evaluated with a paired samples t-test and 2.  RESULTS: 4501 patients were collected of whom 1815 were excluded because they did not meet the inclusion criteria; in the end 2686 remained for analysis. Of these, 37.9% (n = 1018) had changes in the menstrual cycle following COVID-19 vaccination; in 61.8% (n = 630) it was in the amount of bleeding. Of the women who reported menstrual cycle changes, 64.34% (n = 655) were after application of messenger RNA vaccines (35.06%; p = 0.19, 95%CI: -0.35-0.19). In relation to the number of doses applied 72.10% (n = 734) reported modifications in the menstrual cycle after l second vaccine (p = 0.01, CI95%: 0.58-0.98).  CONCLUSIONS: Vaccination against COVID-19 is associated with small changes in the menstrual cycle, without statistical significance. Women receiving two doses of vaccine had changes in the amount of bleeding.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Vacunación]]></kwd>
<kwd lng="es"><![CDATA[COVID-19]]></kwd>
<kwd lng="es"><![CDATA[mujeres]]></kwd>
<kwd lng="es"><![CDATA[cuestionario]]></kwd>
<kwd lng="es"><![CDATA[ciclo menstrual]]></kwd>
<kwd lng="es"><![CDATA[vacuna contra COVID-19]]></kwd>
<kwd lng="en"><![CDATA[Vaccination]]></kwd>
<kwd lng="en"><![CDATA[COVID-19]]></kwd>
<kwd lng="en"><![CDATA[Women]]></kwd>
<kwd lng="en"><![CDATA[Questionnaire]]></kwd>
<kwd lng="en"><![CDATA[Menstrual cycle]]></kwd>
<kwd lng="en"><![CDATA[COVID-19 vaccine]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Hou]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Liao]]></surname>
<given-names><![CDATA[Q]]></given-names>
</name>
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Bai]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Analysis of sex hormones and menstruation in COVID-19 women of child-bearing age]]></article-title>
<source><![CDATA[Reprod Biomed Online]]></source>
<year>2021</year>
<volume>42</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>260-7</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rabin]]></surname>
<given-names><![CDATA[RC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Los ciclos menstruales pueden haber cambiado tras la vacunación, según un estudio]]></article-title>
<source><![CDATA[NYTIMES]]></source>
<year>2022</year>
</nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Xiong]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Lipsitz]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Nasri]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Lui]]></surname>
<given-names><![CDATA[LMW]]></given-names>
</name>
<name>
<surname><![CDATA[Gill]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Phan]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Impact of COVID-19 pandemic on mental health in the general population: A systematic review]]></article-title>
<source><![CDATA[J Affect Disord]]></source>
<year>2020</year>
<volume>277</volume>
<page-range>55-64</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ansong]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Arhin]]></surname>
<given-names><![CDATA[SK]]></given-names>
</name>
<name>
<surname><![CDATA[Cai]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Xu]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[Wu]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Menstrual characteristics, disorders and associated risk factors among female international students in Zhejiang Province, China: a cross-sectional survey]]></article-title>
<source><![CDATA[BMC Womens Health]]></source>
<year>2019</year>
<volume>19</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>35</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sharp]]></surname>
<given-names><![CDATA[GC]]></given-names>
</name>
<name>
<surname><![CDATA[Fraser]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Sawyer]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Kountourides]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Easey]]></surname>
<given-names><![CDATA[KE]]></given-names>
</name>
<name>
<surname><![CDATA[Ford]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The COVID-19 pandemic and the menstrual cycle: research gaps and opportunities]]></article-title>
<source><![CDATA[Int J Epidemiol]]></source>
<year>2021</year>
</nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Edelman]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Boniface]]></surname>
<given-names><![CDATA[ER]]></given-names>
</name>
<name>
<surname><![CDATA[Benhar]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Han]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Matteson]]></surname>
<given-names><![CDATA[KA]]></given-names>
</name>
<name>
<surname><![CDATA[Favaro]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Association Between Menstrual Cycle Length and Coronavirus Disease 2019 (COVID-19) Vaccination: A US Cohort]]></article-title>
<source><![CDATA[Obstet Gynecol]]></source>
<year>2022</year>
</nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="book">
<collab>CDC</collab>
<source><![CDATA[Selected adverse events reported after COVID-19 vaccination]]></source>
<year>2022</year>
<publisher-name><![CDATA[Centers for Disease Control and Prevention]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="book">
<collab>WHO</collab>
<source><![CDATA[WHO Coronavirus disease (COVID-19) dashboard]]></source>
<year>2020</year>
<publisher-name><![CDATA[Bangladesh Physiotherapy Association (BPA)]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ndwandwe]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Wiysonge]]></surname>
<given-names><![CDATA[CS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[COVID-19 vaccines]]></article-title>
<source><![CDATA[Curr Opin Immunol]]></source>
<year>2021</year>
<volume>71</volume>
<page-range>111-6</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="">
<collab>MHRA</collab>
<source><![CDATA[Coronavirus vaccine - weekly summary of Yellow Card reporting]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="">
<collab>NIH</collab>
<source><![CDATA[Notice of Special Interest (NOSI) to Encourage Administrative Supplement Applications to Investigate COVID-19 Vaccination and Menstruation (Admin Supp - Clinical Trial Optional)]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Munro]]></surname>
<given-names><![CDATA[MG]]></given-names>
</name>
<name>
<surname><![CDATA[Critchley]]></surname>
<given-names><![CDATA[HOD]]></given-names>
</name>
<name>
<surname><![CDATA[Fraser]]></surname>
<given-names><![CDATA[IS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Menstrual Disorders Committee. The two FIGO systems for normal and abnormal uterine bleeding symptoms and classification of causes of abnormal uterine bleeding in the reproductive years: 2018 revisions]]></article-title>
<source><![CDATA[Int J Gynaecol Obstet]]></source>
<year>2018</year>
<volume>143</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>393-408</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Prado]]></surname>
<given-names><![CDATA[RCR]]></given-names>
</name>
<name>
<surname><![CDATA[Silveira]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Asano]]></surname>
<given-names><![CDATA[RY]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[SARS-CoV-2 (COVID-19) pandemic and a possible impact in the future of menstrual cycle research]]></article-title>
<source><![CDATA[Health Sci Rep]]></source>
<year>2021</year>
<volume>4</volume>
<numero>2</numero>
<issue>2</issue>
</nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Girardi]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Bremer]]></surname>
<given-names><![CDATA[AA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Scientific Evidence Supporting Coronavirus Disease 2019 (COVID-19) Vaccine efficacy and safety in people planning to conceive or who are pregnant or lactating]]></article-title>
<source><![CDATA[Obstet Gynecol]]></source>
<year>2022</year>
<volume>139</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>3-8</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Male]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Menstrual changes after covid-19 vaccination]]></article-title>
<source><![CDATA[BMJ]]></source>
<year>2021</year>
<volume>374</volume>
<numero>2211</numero>
<issue>2211</issue>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
