<?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>0048-7732</journal-id>
<journal-title><![CDATA[Revista de Obstetricia y Ginecología de Venezuela]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Obstet Ginecol Venez]]></abbrev-journal-title>
<issn>0048-7732</issn>
<publisher>
<publisher-name><![CDATA[Sociedad de Obstetricia y Ginecología de Venezuela]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0048-77322005000300005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de la combinación estradiol - acetato de noretisterona sobre los niveles de proteína c reactiva en menopáusicas ooforectomizadas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyna-Villasmil]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerra-Velásquez]]></surname>
<given-names><![CDATA[Mery]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyna-Villasmil]]></surname>
<given-names><![CDATA[Nadia]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mejias-Montilla]]></surname>
<given-names><![CDATA[Jorly]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Hospital Central  Dr  Urquinaona Servicio de Obstetricia y Ginecología - Maternidad  Dr  Nerio Belloso ]]></institution>
<addr-line><![CDATA[Maracaibo Zulia]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2005</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2005</year>
</pub-date>
<volume>65</volume>
<numero>3</numero>
<fpage>129</fpage>
<lpage>132</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_arttext&amp;pid=S0048-77322005000300005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_abstract&amp;pid=S0048-77322005000300005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://ve.scielo.org/scielo.php?script=sci_pdf&amp;pid=S0048-77322005000300005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Objetivo: Determinar el efecto de la combinación estradiol y acetato de noretisterona sobre los niveles de proteína C reactiva en menopáusicas ooforectomizadas. Método: Se incluyeron treinta y seis pacientes, sometidas a histerectomía y salpingo-ooforectomía bilateral con síntomas climatéricos. Las pacientes fueron tratadas con 2 mg de estradiol y 1 mg de acetato de noretisterona diario. Se midieron los niveles de proteína C reactiva sérica al inicio del estudio y a los 3, 6, 9 y 12 meses. Ambiente: Hospital Central "Dr. Urquinaona". Maracaibo. Estado Zulia Resultados: Se observó aumento de la proteína C reactiva a los 3 meses, pero no fue considerado significativo (p > 0,05). Posteriormente, no se observaron variaciones significativas a los 6, 9 y 12 meses con relación al valor inicial (p > 0,05). Conclusión: La administración oral de estradiol y acetato de noretisterona no produce aumento de los niveles de proteína C reactiva en pacientes menopáusicas ooforectomizadas, lo cual podría contribuir al beneficio cardiovascular de las usuarias de la terapia hormonal de reemplazo combinada.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Objective: To determine the effect of estradiol and norethisterone acetate on serum C reactive protein levels in healthy oophorectomised postmenopausal women at baseline and at 3, 6, 9 and 12 months. Method: Thirty six patients, who underwent hysterectomy and bilateral salpingo-oophorectomy with climacteric symptoms were included. Patients were treated with 2 mg of estradiol and 1 mg of norethisterone acetate daily. C reactive protein were measured at baseline and at 3, 6, 9 and 12 months. Setting: Hospital Central "Dr. Urquinaona". Maracaibo. Estado Zulia Results: An increased of C reactive protein was observed at 3 months, but it was consider not significant (p > 0,05). Later, non significant variations were observed at 6, 9 and 12 months related to initial value (p > 0,05). Conclusion: Oral administration of estradiol and nortisterone acetate do not produce increase of C reactive protein levels in oophorectomised postmenopausal patients, which could contribute to cardiovascular benefit of users of combined hormonal replacement therapy.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Menopausia]]></kwd>
<kwd lng="es"><![CDATA[Proteína C reactiva]]></kwd>
<kwd lng="es"><![CDATA[Estradiol]]></kwd>
<kwd lng="es"><![CDATA[Acetato de Noretisterona]]></kwd>
<kwd lng="es"><![CDATA[Oofosectomizadas]]></kwd>
<kwd lng="en"><![CDATA[Menopause. C-Reactive protein]]></kwd>
<kwd lng="en"><![CDATA[Estradiol]]></kwd>
<kwd lng="en"><![CDATA[Nortisterone acetate]]></kwd>
<kwd lng="en"><![CDATA[Oophosectomised postmenopausal]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[   <B><FONT FACE="Verdana">    <P ALIGN="CENTER">Efecto de la combinaci&oacute;n estradiol - acetato de noretisterona sobre los niveles de prote&iacute;na c reactiva en menop&aacute;usicas ooforectomizadas</P> </B></FONT><FONT FACE="Verdana" SIZE=2>    <P ALIGN="CENTER"></P>     <P ALIGN="CENTER">Drs Eduardo Reyna-Villasmil, Mery Guerra-Vel&aacute;squez, Mg. Sc. Nadia Reyna-Villasmil, Lic. Jorly Mejias-Montilla.</P>     <P ALIGN="CENTER"></P>     <P ALIGN="CENTER">Servicio de Obstetricia y Ginecolog&iacute;a - Maternidad "Dr. Nerio Belloso", Hospital Central "Dr. Urquinaona", Maracaibo, Estado Zulia.</P>     <P ALIGN="JUSTIFY"></P>     <P ALIGN="JUSTIFY">&nbsp;</P> <B>    <P ALIGN="JUSTIFY">RESUMEN</P> </B>    <P ALIGN="JUSTIFY">Objetivo: Determinar el efecto de la combinaci&oacute;n estradiol y acetato de noretisterona sobre los niveles de prote&iacute;na C reactiva en menop&aacute;usicas ooforectomizadas.</P>     ]]></body>
<body><![CDATA[<P ALIGN="JUSTIFY">M&eacute;todo: Se incluyeron treinta y seis pacientes, sometidas a histerectom&iacute;a y salpingo-ooforectom&iacute;a bilateral con s&iacute;ntomas climat&eacute;ricos. Las pacientes fueron tratadas con 2 mg de estradiol y 1 mg de acetato de noretisterona diario. Se midieron los niveles de prote&iacute;na C reactiva s&eacute;rica al inicio del estudio y a los 3, 6, 9 y 12 meses.</P>     <P ALIGN="JUSTIFY">Ambiente: Hospital Central &quot;Dr. Urquinaona&quot;. Maracaibo. Estado Zulia</P>     <P ALIGN="JUSTIFY">Resultados: Se observ&oacute; aumento de la prote&iacute;na C reactiva a los 3 meses, pero no fue considerado significativo (p &gt; 0,05). Posteriormente, no se observaron variaciones significativas a los 6, 9 y 12 meses con relaci&oacute;n al valor inicial (p &gt; 0,05). </P>     <P ALIGN="JUSTIFY">Conclusi&oacute;n: La administraci&oacute;n oral de estradiol y acetato de noretisterona no produce aumento de los niveles de prote&iacute;na C reactiva en pacientes menop&aacute;usicas ooforectomizadas, lo cual podr&iacute;a contribuir al beneficio cardiovascular de las usuarias de la terapia hormonal de reemplazo combinada.</P>     <P ALIGN="JUSTIFY"></P>     <P ALIGN="JUSTIFY">Palabras clave: Menopausia. Prote&iacute;na C reactiva. Estradiol. Acetato de Noretisterona, Oofosectomizadas.</P>     <P ALIGN="JUSTIFY"></P> <B>    <P ALIGN="JUSTIFY">SUMMARY</P> </B>    <P ALIGN="JUSTIFY">Objective: To determine the effect of estradiol and norethisterone acetate on serum C reactive protein levels in healthy oophorectomised postmenopausal women at baseline and at 3, 6, 9 and 12 months.</P>     <P ALIGN="JUSTIFY">Method: Thirty six patients, who underwent hysterectomy and bilateral salpingo-oophorectomy with climacteric symptoms were included. Patients were treated with 2 mg of estradiol and 1 mg of norethisterone acetate daily. C reactive protein were measured at baseline and at 3, 6, 9 and 12 months.</P>     ]]></body>
<body><![CDATA[<P ALIGN="JUSTIFY">Setting: Hospital Central &quot;Dr. Urquinaona&quot;. Maracaibo. Estado Zulia</P>     <P ALIGN="JUSTIFY">Results: An increased of C reactive protein was observed at 3 months, but it was consider not significant (p &gt; 0,05). Later, non significant variations were observed at 6, 9 and 12 months related to initial value (p &gt; 0,05). </P>     <P ALIGN="JUSTIFY">Conclusion: Oral administration of estradiol and nortisterone acetate do not produce increase of C reactive protein levels in oophorectomised postmenopausal patients, which could contribute to cardiovascular benefit of users of combined hormonal replacement therapy.</P>     <P ALIGN="JUSTIFY"></P>     <P ALIGN="JUSTIFY">Key words: Menopause. C-Reactive protein. Estradiol. Nortisterone acetate, Oophosectomised postmenopausal.</P>     <P ALIGN="JUSTIFY"></P>     <P ALIGN="JUSTIFY">&nbsp;</P> <B>    <P ALIGN="JUSTIFY">INTRODUCCI&Oacute;N</P> </B>    <P ALIGN="JUSTIFY"></P>     <P ALIGN="JUSTIFY">&nbsp;&nbsp;&nbsp; La prote&iacute;na C reactiva (PCR), un reactante de fase aguda, es un marcador sensitivo de inflamaci&oacute;n (1,2). La PCR puede ser un indicador de predicci&oacute;n del aumento del riesgo de enfermedades cardiovasculares a futuro o puede tener propiedades proinflamatorias y aterog&eacute;nicas directas (3-5). Se ha demostrado que la PCR induce la aparici&oacute;n de mol&eacute;culas de adhesi&oacute;n en las c&eacute;lulas endoteliales humanas cuando est&aacute; presente en el suero. Estos hallazgos apoyan la hip&oacute;tesis que la PCR juega un papel directo en la promoci&oacute;n de los componentes inflamatorios de la aterosclerosis (6,7).</P>     ]]></body>
<body><![CDATA[<P ALIGN="JUSTIFY">&nbsp;&nbsp;&nbsp; Se ha reportado que los niveles elevados de PCR pueden asociarse con trombosis venosa. En dos estudios de casos y controles, los niveles de PCR fueron mayores en pacientes con trombosis venosa previa que en los controles (8,9), aunque en otro estudio no se encontr&oacute; tal relaci&oacute;n (10). Los altos niveles de PCR pueden ser uno de los factores que llevan a un aumento en el riesgo de trombosis venosa profunda en usuarias de terapia hormonal de reemplazo (THR) (11,12).</P>     <P ALIGN="JUSTIFY">&nbsp;&nbsp;&nbsp; Las menop&aacute;usicas que utilizan THR pueden presentar niveles elevados de PCR (4,13,14). El aumento de la PCR asociado al uso de THR puede tener efectos pro-inflamatorios y puede aumentar la vulnerabilidad de la placa (3-5). El impacto cardiovascular de la THR en la menop&aacute;usica ha sido objeto de gran discusi&oacute;n (15,16). Se ha sugerido que el aumento de la concentraci&oacute;n de la PCR refleja una acci&oacute;n proinflamatoria de los estr&oacute;genos sobre la pared arterial, y esto podr&iacute;a explicar el aumento del riesgo cardiovascular descrito durante el primer a&ntilde;o de uso de THR en el estudio HERS (11). Los datos del estudio Women´s Health, un estudio con estr&oacute;genos equinos conjugados para la prevenci&oacute;n primaria de la enfermedad card&iacute;aca coronaria (17), demostraron que las concentraciones elevadas de PCR est&aacute;n asociadas con un aumento en el riesgo cardiovascular en menop&aacute;usicas (18,19).</P>     <P ALIGN="JUSTIFY">&nbsp;&nbsp;&nbsp; La v&iacute;a de administraci&oacute;n (oral, nasal o transd&eacute;rmica) tambi&eacute;n parece influir en el efecto de la THR sobre las concentraciones s&eacute;ricas de PCR en las semanas siguientes al inicio del tratamiento (20). La mayor&iacute;a de las preparaciones orales aumentan los niveles de PCR en las 4 semanas siguientes al inicio de la terapia (11). Las v&iacute;as nasal y transd&eacute;rmica no parecen tener este efecto (7, 20). Tampoco se conocen los posibles efectos que pueden tener el uso de THR combinada (estr&oacute;genos y progestinas) sobre los niveles de PCR. El objetivo de la investigaci&oacute;n fue determinar el efecto de la combinaci&oacute;n estradiol y acetato de nortisterona sobre los niveles de prote&iacute;na C reactiva en menop&aacute;usicas sanas ooforectomizadas.</P>     <P ALIGN="JUSTIFY"></P> <B>    <P ALIGN="JUSTIFY">PACIENTES Y M&Eacute;TODOS</P> </B>    <P ALIGN="JUSTIFY">&nbsp;&nbsp;&nbsp; Se incluyeron treinta y seis pacientes atendidas en forma ambulatoria en la consulta de menopausia del Hospital Central &quot;Dr. Urquinaona&quot;. Las pacientes ten&iacute;an entre 41 y 59 a&ntilde;os de edad, fueron sometidas a histerectom&iacute;a y salpingo-ooforectom&iacute;a bilateral con s&iacute;ntomas climat&eacute;ri-cos, fumaban menos de 5 cigarrillos por d&iacute;a y eran normotensas (menos de 140/90 mm de Hg). Ninguna de las pacientes hab&iacute;a usado previamente THR y no utilizaron medicamentos que alteraran el metabolismo de los l&iacute;pidos, antihipertensivos, vitaminas u antioxidantes en los 3 meses previos al inicio o durante el estudio. Se excluyeron las pacientes con consumo de alcohol, enfermedad card&iacute;aca, neopl&aacute;sica, cerebrovascular, tromboemb&oacute;lica, hep&aacute;tica o renal previa. La cirug&iacute;a se practic&oacute; por lo menos 3 meses antes que las pacientes se incluyeran en el estudio, para evitar el aumento de los niveles de la PCR inducido por la intervenci&oacute;n. El estado menop&aacute;usico se confirm&oacute; por niveles hormonales de estradiol menor 30 pg/mL y hormona fol&iacute;culo estimulante (FSH) s&eacute;rica mayor de 35 mLU/L). Se les realiz&oacute; electrocardiograma a todas las participantes, y aquellas que las tuviesen anormales fueron excluidas del estudio.</P>     <P ALIGN="JUSTIFY">&nbsp;&nbsp;&nbsp; Las pacientes fueron tratadas con 2 mg de estradiol y 1 mg de acetato de noretisterona diario por 12 meses. Las muestras de sangre venosa se tomaron en la ma&ntilde;ana despu&eacute;s de por lo menos 12 horas ayuno de al momento del inicio del estudio, a los 3, 6, 9 y 12 meses de tratamiento. Se utiliz&oacute; un inmunoensayo enzim&aacute;tico para medir los niveles de PCR s&eacute;rica. Los coeficientes de variaci&oacute;n intra e inter-ensayos fueron menores de 5%.</P>     <P ALIGN="JUSTIFY">&nbsp;&nbsp;&nbsp; Los datos se reportan como promedio desviaci&oacute;n est&aacute;ndar. La prueba de an&aacute;lisis de varianza (ANOVA) se utiliz&oacute; para evaluar los cambios en la PCR en cada uno de los periodos de tratamiento del estudio. Un valor de p &lt; 0,05 fue aceptado como significativo.</P>     <P ALIGN="JUSTIFY"></P> <B>    <P ALIGN="JUSTIFY">RESULTADOS</P> </B>    ]]></body>
<body><![CDATA[<P ALIGN="JUSTIFY">&nbsp;&nbsp;&nbsp; Las caracter&iacute;sticas cl&iacute;nicas iniciales de las 36 pacientes se muestran en el  <a href="#cuadr1">Cuadro 1.</a> </P>     <P ALIGN="JUSTIFY">&nbsp;&nbsp;&nbsp; Los efectos del tratamiento sobre los niveles de PCR se muestran en el  <a href="#cuadr2">Cuadro 2</a> y <a href="#fig1">Figura 1</a>. Se observ&oacute; un incremento del 32% con respecto al valor inicial en los niveles de PCR a los 3 meses pero no fue considerado significativo (p &gt; 0,05). Este aumento se mantuvo en el tiempo a los 6, 9 y 12 meses con relaci&oacute;n al valor inicial (p &gt; 0,05), pero se observ&oacute; una disminuci&oacute;n progresiva hacia los valores iniciales. En toda la poblaci&oacute;n no se encontr&oacute; una relaci&oacute;n significativa entre los niveles basales de PCR y los cambios absolutos durante cualquiera de los momentos de determinaci&oacute;n. </P>     <P ALIGN="JUSTIFY"></P> <B>    <P ALIGN="JUSTIFY">DISCUSI&Oacute;N</P> </B>    <P ALIGN="JUSTIFY">&nbsp;&nbsp;&nbsp; La prote&iacute;na C reactiva est&aacute; fuertemente asociada con la aparici&oacute;n de enfermedad coronaria (3,5). La terapia hormonal de reemplazo afecta los niveles de PCR, dependiendo de la v&iacute;a de administraci&oacute;n. Los estr&oacute;genos orales parecen aumentar los niveles de PCR, lo cual no se observa por la v&iacute;a transd&eacute;rmica o nasal (7,20,21). En un peque&ntilde;o estudio prospectivo, al azar, doble ciego, se investig&oacute; el efecto de 2 mg de estradiol oral comparado con 50 mg de estradiol transd&eacute;rmico (20). Las concentraciones de PCR aumentaron en forma significativa con el estradiol oral, pero no con el estradiol transd&eacute;rmico o el grupo placebo. Walsh y col. (22) reportaron que los estr&oacute;genos equinos conjugados aumentan las concentraciones s&eacute;ricas de PCR. En otro estudio (23), se encontraron niveles significativamente m&aacute;s bajos de PCR en las usuarias de THR transd&eacute;rmica comparado con las usuarias de THR por v&iacute;a oral.</P>     <P ALIGN="JUSTIFY"><a name="cuadr1"></a></P>     <P ALIGN="center"> <img border="0" src="/img/fbpe/og/v65n3/art5tab1.JPG" width="426" height="231"></P>     
<P ALIGN="center"> <a name="cuadr2"></a></P>     <P ALIGN="center"> <img border="0" src="/img/fbpe/og/v65n3/art5tab2.JPG" width="426" height="187"></P>     
<P ALIGN="center"> <a name="fig1"></a></P>     ]]></body>
<body><![CDATA[<P ALIGN="center"> <img border="0" src="/img/fbpe/og/v65n3/ART5IMG1.jpg"></P>     
<P ALIGN="center"> Figura 1: Niveles de proteína C reactiva antes y durante el tratamiento</P>     <P ALIGN="JUSTIFY">&nbsp;&nbsp;&nbsp; Modena y col. (24) detectaron que, comparado con las pacientes que no recib&iacute;an THR, los niveles promedio de PCR eran 40% m&aacute;s altos entre las pacientes que tomaban estr&oacute;genos orales y 35% m&aacute;s bajos entre las que usaban estradiol transd&eacute;rmico. Decensi y col. (25) reportaron que no se observaban cambios significativos en los niveles de PCR con el uso de estradiol transd&eacute;rmico por m&aacute;s de 12 meses, mientras que el uso de estr&oacute;genos equinos conjugados incrementaba la PCR en 48 y 64% a los 6 y 12 meses respectivamente, con relaci&oacute;n a los valores basales. En otros estudios, Post y col. (7) reportaron que el tratamiento con 1 mg de 17 b-estradiol micronizado de 3 meses a 1 a&ntilde;o estaba asociado con aumento de la PCR en menop&aacute;usicas sanas, mientras que 50 mg de 17 b-estradiol transd&eacute;rmico no produjo aumento.</P>     <P ALIGN="JUSTIFY">&nbsp;&nbsp;&nbsp; No se conoce por qu&eacute; la v&iacute;a de administraci&oacute;n de estr&oacute;genos afecta los niveles de PCR, la explicaci&oacute;n puede involucrar las propiedades farmacocin&eacute;ticas de las preparaciones hormonales. El tratamiento oral puede tener una biodisponibilidad variable y se necesitan altas dosis para lograr la eficacia terap&eacute;utica como resultado de los efectos del primer paso intestinal-hep&aacute;tico (26-28). Los estr&oacute;genos orales son absorbidos r&aacute;pida y completamente en el tracto gastrointestinal debido a que son liposolubles, donde son dirigidos hacia la sangre portal y alcanzan el h&iacute;gado en grandes concentraciones (29). La prote&iacute;na C reactiva se produce en el h&iacute;gado y el principal regulador de la s&iacute;ntesis son las citokinas inflamatorias, como la interleukina-6, factor de necrosis tumoral a e interleukina 1 (30). Pfeilschifter y col. (31) reportaron que la administraci&oacute;n de estr&oacute;genos aumenta la actividad de las citokinas inflamatorias. Como la PCR es secretada por el hepatocito, el uso de estr&oacute;genos afecta los niveles de PCR, posiblemente debido al primer paso hep&aacute;tico. El posible papel en el riesgo cardiovascular de los estr&oacute;genos orales puede estar relacionado a su efecto al incrementar los niveles de PCR (32).</P>     <P ALIGN="JUSTIFY">&nbsp;&nbsp;&nbsp; El estudio PEPI fue un estudio dise&ntilde;ado para determinar los efectos de las diferentes preparaciones hormonales en la posmenopausia sobre los factores de riesgo card&iacute;acos. Comparado con el placebo, los estr&oacute;genos solos o en combinaci&oacute;n con progesterona micronizada o el acetato de medroxiprogesterona aumentaron las concentraciones de PCR a los 12 y 36 meses de seguimiento (33). Los datos de esta investigaci&oacute;n sugieren que la adici&oacute;n de progestina puede tener un papel protector parcial en contra de los efectos pro-inflamatorios de los estr&oacute;genos. El efecto anti-inflamatorio de la progesterona ha sido reportado con anterioridad (34-36), y se piensa que esta acci&oacute;n anti-inflamatoria es mediada por los receptores de progesterona. El aparente papel protector de la progesterona sobre el aumento de la PCR inducido por los estr&oacute;genos en este estudio apoya estos hechos. Se concluye que la administraci&oacute;n oral de estradiol y acetato de noretisterona no produce aumento de los niveles de PCR en pacientes menop&aacute;usicas ooforectomizadas, lo cual podr&iacute;a contribuir al beneficio cardiovascular de las usuarias de la THR combinada</P>     <P ALIGN="JUSTIFY"></P> <B>    <P ALIGN="JUSTIFY">REFERENCIAS</P> </B>    <P ALIGN="JUSTIFY"></P>     <!-- ref --><P ALIGN="JUSTIFY">1. Ridker P, Haughie P. Prospective studies of C-reactive protein as a risk factor for cardiovascular disease. J Invest Med. 1998; 46:391-395.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=2066600&pid=S0048-7732200500030000500001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><P ALIGN="JUSTIFY">2. Fern&aacute;ndez G. Prote&iacute;na C reactiva en obstetricia. 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