Department Gynaecology and Obstetrics, Puerta de Hierro University Hospital of Majadahonda, Majadahonda, Madrid, Spain
Oscar Martinez-Perez & Maria Begoña Encinas Pardilla
Department Reproductive Medicine and Gynaecology, Obstetrics, Dexeus University Hospital, Barcelona, Catalunya, Spain
Pilar Prats Rodriguez
Department Gynaecology and Obstetrics, La Paz University Hospital. Madrid, Madrid, Spain
Marta Muner Hernandez
Department Gynaecology and Obstetrics, San Carlos University Hospital. Madrid, Madrid, Spain
Noelia Perez Perez
Department Gynaecology and Obstetrics, Santa Caterina Hospital, Girona, Catalunya, Spain
Maria Rosa Vila Hernandez
Department Gynaecology and Obstetrics, University Hospital of Salamanca, Salamanca, Castilla y León, Spain
Ana Villalba Yarza
Department Obstetrics and Gynaecology, Quironsalud Madrid University Hospital. Madrid, Madrid, Spain
Olga Nieto Velasco
Department Gynaecology and Obstetrics, Getafe University Hospital, Getafe, Madrid, Spain
Pablo Guillermo Del Barrio Fernandez
Department Gynaecology and Obstetrics, Doce de Octubre University Hospital, Comunidad de Madrid, Madrid, Spain
Laura Forcen Acebal
Department Gynaecology and Obstetrics, Severo Ochoa University Hospital, Leganes, Madrid, Spain
Carmen Maria Orizales Lago
Department Gynaecology and Obstetrics, La Fe University and Polytechnic Hospital, Comunidad Valenciana, Valencia, Spain
Alicia Martinez Varea
Department Obstetrics and Gynaecology, Sant Joan de Reus University Hospital, Reus, Catalunya, Spain
Begoña Muñoz Abellana
Department Gynaecology and Obstetrics, Regional University Hospital of Malaga, Malaga, Andalucía, Spain
Maria Suarez Arana
Department Obstetrics and Gynaecology, University Hospital of Ferrol, Ferrol, A Coruña, Spain
Laura Fuentes Ricoy
Department Gynaecology and Obstetrics, Doctor Josep Trueta University Hospital of Girona, Girona, Catalunya, Spain
Clara Martinez Diago
Department Obstetrics and Gynaecology, University Hospital Complex of A Coruña, A Coruña, Spain
Maria Jesus Janeiro Freire
Department Obstetrics and Gynaecology, HM Hospitals, Madrid, Spain
Macarena Alférez Alvarez-Mallo
Department Gynaecology and Obstetrics, University Hospital of Torrejon, Torrejon de Ardoz, Madrid, Spain
Cristina Casanova Pedraz
Department Obstetrics and Gynaecology, Regional Hospital of Inca, Inca, Illes Balears, Spain
Onofre Alomar Mateu
Department Obstetrics and Gynaecology, Parc Taulí Hospital, Barcelona, Catalunya, Spain
Cristina Lesmes Heredia
Department Gynaecology and Obstetrics, San Pedro de Alcántara Hospital, Caceres, Extremadura, Spain
Juan Carlos Wizner de Alva
Department Gynaecology and Obstetrics, Rio Hortega University Hospital, Valladolid, Castilla y León, Spain
Rut Bernardo Vega
Department Gynaecology and Obstetrics, Arnau de Vilanova University Hospital, Lleida, Catalunya, Spain
Montserrat Macia Badia
Department Gynaecology and Obstetrics, Valladolid University Hospital, Valladolid, Castilla y León, Spain
Cristina Alvarez Colomo
Department Gynaecology and Obstetrics, General University Hospital of Ciudad Real, Ciudad Real, Castilla-La Mancha, Spain
Antonio Sanchez Muñoz
Department Obstetrics and Gynaecology, Germans Trias i Pujol University Hospital, Barcelona, Catalunya, Spain
Laia Pratcorona Alicart
Department Gynaecology and Obstetrics, University Hospital of Burgos, Burgos, Castilla y León, Spain
Ruben Alonso Saiz
Department Obstetrics and Gynaecology, Joan XXIII University Hospital of Tarragona, Tarragona, Catalunya, Spain
Monica Lopez Rodriguez
Department Gynaecology and Obstetrics, Infanta Sofia University Hospital, San Sebastian de los Reyes, Madrid, Spain
Maria del Carmen Barbancho Lopez
Department Obstetrics and Gynaecology, Poniente Hospital of Almería, El Ejido, Andalucía, Spain
Marta Ruth Meca Casbas
Department Obstetrics and Gynaecology, University Hospital of Cabueñes, Gijon, Asturias, Spain
Oscar Vaquerizo Ruiz
Department Obstetrics and Gynaecology, Son Espases University Hospital, Palma de Mallorca, Illes Balears, Spain
Eva Moran Antolin
Department Obstetrics and Gynaecology, Virgen de la Luz Hospital, Cuenca, Castilla-La Mancha, Spain
Maria Jose Nuñez Valera
Department Gynaecology and Obstetrics, University Assistance Complex of Leon, Leon, Castilla y Leon, Spain
Camino Fernandez Fernandez
Department Obstetrics and Gynaecology, Son Llatzer University Hospital, Palma de Mallorca, Illes Balears, Spain
Albert Tubau Navarra
Department Gynaecology and Obstetrics, University Hospital of El Tajo, Aranjuez, Madrid, Spain
Alejandra Maria Cano Garcia
Department Gynaecology and Obstetrics, Infanta Margarita Hospital, Andalucía, Cabra, Spain
Carmen Baena Luque
Department Obstetrics and Gynaecology, University Hospital of Jerez de la Frontera, Jerez de la Frontera, Andalucía, Spain
Susana Soldevilla Perez
Department Obstetrics and Gynaecology, Txagorritxu University Hospital of Araba, Vitoria-Gasteiz, País Vasco, Spain
Irene Gastaca Abasolo
Department Obstetrics and Gynaecology, Central University Hospital of Asturias, Oviedo, Asturias, Spain
Jose Adanez Garcia
Department Gynaecology and Obstetrics, University Hospital of Fuenlabrada, Fuenlabrada, Madrid, Spain
Maria Teulon Gonzalez
Department Obstetrics and Gynaecology, Virgen de las Nieves University Hospital, Granada, Andalucía, Spain
Alberto Puertas Prieto
Department Gynaecology and Obstetrics, Virgen de Valme University Hospital, Sevilla, Andalucía, Spain
Rosa Ostos Serna
Department Obstetrics and Gynaecology, Virgen Macarena University Hospital, Sevilla, Andalucía, Spain
Maria del Pilar Guadix Martin
Department Gynaecology and Obstetrics, Virgen de la Concha Hospital, Zamora, Castilla y León, Spain
Monica Catalina Coello
Department Gynaecology and Obstetrics, Parc de Salut Mar University Hospital, Barcelona, Catalunya, Spain
Elena Ferriols Perez
Department Obstetrics and Gynaecology, San Cecilio University Hospital of Granada, Granada, Andalucía, Spain
Africa Caño Aguilar
Fundación de Investigación Biomédica, Puerta de Hierro University Hospital of Majadahonda, Majadahonda, Madrid, Spain
Maria Luisa De la Cruz Conty
Department Gynaecology and Obstetrics, University of Seville, G. Chacon (Viamed Santa Angela de la Cruz Hospital), Sevilla, Andalucia, Spain
Jose Antonio Sainz Bueno
OMP contributed with the design and coordination of the study, interpretation of results and writing of the manuscript; PPR and JASB contributed with the interpretation of results and writing of the manuscript; MMH, MBEP, NPP, MRVH, AVY, ONV, PGBF, LFA, CMOL, AMV, BMA, MSA, LFR, CMD, MJJF, MAA-M, CCP, OAM, CLH, JCWA, RBV, MMB, CAC, ASM, LPA, RAS, MLR, MCBL, MRMC, OVR, EMA, MJNV, CFF, ATN, AMCG, CBL, SSP, IGA, JAG, MTG, APP, ROS, MPGM, MCC, EFP collected and curated the data, and did the critical revision of the manuscript; ACA centralized and cleansed the screening data and MLCC did the statistical analysis of data and writing of the manuscript. All authors read and approved the final manuscript.