**Meet the editor**

Julio Elito Junior PhD graduated in Medicine from the Federal University of São Paulo (UNIFESP), Brazil, in 1989. He obtained his Masters in 1995 and his Doctorate in 1997 both from UNIFESP. He is a specialist in laparoscopy (Cleveland Clinic Foundation, 2000) and has a PhD in Reproductive Medicine (2008). Due to the relevance of his research he obtained the title of Associate Professor

of the Department of Obstetrics at UNIFESP (2006). He has published a predictive score for medical treatment in ectopic pregnancy and reference charts for twins, with 221 citations in the international literature. He has published 62 articles in international and national journals, is a reviewer in several national and international journals, and a speaker at a number of national and international congresses. He wrote the book *Ectopic Pregnancy* (2010), as well as numerous chapters in national and international books. He has been nominated several times for honored professor by his students at the Medical School of Federal University of São Paulo (UNIFESP).

Contents

**Preface VII**

Johan Fellman

**Pregnancy 47**

**Pregnancy 63**

Chapter 1 **Historical Studies of Hellin's Law 3**

Chapter 2 **Twinning as an Evolved Age-Dependent Physiological**

Valentova, Nancy Segal and Emma Otta

Chapter 4 **Early Pregnancy Ultrasound Assessment of Multiple**

Michael Syndos and George Daskalakis

Chapter 5 **Prenatal Attachment in Twin Pregnancy 81**

Fiona Langdon and Roger Hart

**Mechanism: Evidence from Large Brazilian Samples 27** Marco Varella, Eloisa Fernandes, Jonas Arantes, Tiziana Acquaviva, Tania Lucci, Rafael Hsu, Vinicius David, Vera Bussab, Jaroslava

Panagiotis Antsaklis, Maria Papamichail, Marianna Theodora,

Chiara Ionio, Eleonora Mascheroni, Caterina Colombo and Gianluca

Chapter 3 **Judicious Fertility Treatment to Minimise the Risk of Multiple**

**Section 1 Epidemiology 1**

**Section 2 Etiology 25**

**Section 3 Diagnosis 61**

**Section 4 Prenatal Care 79**

Lista
