Chief Editor's 2019 annual report 
Bart C.J.M. Fauser, Kamal K. Ahuja 

Clinical embryology

Alternative patterns of partial embryo compaction: prevalence, morphokinetic history and possible implications 
Cristina Lagalla, Giovanni Coticchio, Raffaella Sciajno, Nicoletta Tarozzi, Carlotta Zacà, Andrea Borini 

Clinical assisted reproductive technology

Cervical pregnancy in assisted reproduction: an analysis of risk factors in 91,067 ongoing pregnancies 
Roberto Matorras, Adriana Zallo, Rafael Hernandez-Pailos, Marcos Ferrando, Fernando Quintana, José Remohi, Iker Malaina, Lucía Laínz, Antonia Exposito 

The effect of follicular phase length on cycle outcomes and endometrial development in gonadotrophin ovarian stimulation/intrauterine insemination cycles 
Jennifer B. Bakkensen, Georgios Christou, Irene Dimitriadis, Kaitlyn James, Irene Souter 

Cancer in IVF patients treated at age 40 years and older: long term follow-up 
Avi Tsafrir, Liat Lerner-Geva, Inna Zaslavsky-Paltiel, Neri Laufer, Alex Simon, Sharon Einav, Talia Eldar-Geva, Hananel Holzer, Michael Gal, Galit Hirsh-Yechezkel 

Analysis of 122 triplet and one quadruplet pregnancies after single embryo transfer in Japan 
Satoko Yamashita, Yuko Ikemoto, Asako Ochiai, Satoshi Yamada, Keiichi Kato, Motoharu Ohno, Tomoya Segawa, Yoshiharu Nakaoka, Mayumi Toya, Satoshi Kawachiya, Yoshiaki Sato, Toshifumi Takahashi, Shigeto Takeuchi, Mari Nomiyama, Chisa Tabata, Toshihiro Fujiwara, Sumihide Okamoto, Toshihiro Kawamura, Jun Kawagoe, Mitsutoshi Yamada, Yuichi Sato, Genzo Marumo, Rikikazu Sugiyama, Keiji Kuroda 

Infertility

Role of gene polymorphisms related to progesterone elevation in women undergoing long GnRH agonist protocols 
Ping Cao, Benyu Miao, Yan Xu, Qi Fan, Qian Zhang, Guirong Zhang, Canquan Zhou, Yanwen Xu 

Is early initiation of infertility treatment justified in women over the age of 35 years? 
Edgardo Somigliana, Andrea Busnelli, Paola Vigano, Walter Vegetti, Alice Goisis, Paolo Vercellini 

Endometrioma, the follicular fluid inflammatory network and its association with oocyte and embryo characteristics 
Jennifer Yland, Luiz Fernando Pina Carvalho, Michael Beste, Amelia Bailey, Cassandra Thomas, Mauricio S. Abrão, Catherine Racowsky, Linda Griffith, Stacey A. Missmer 

Key recommendations for high-quality female oncofertility care based on international clinical practice guidelines 
Özlem Baysal, Michelle Van den Berg, Floor Beldman, Didi D.M. Braat, Willianne L.D.M. Nelen, Rosella P.M.G. Hermens, Catharina C.M. Beerendonk 

Male reproduction and fertility

Potential benefits of the use of sympathomimetics for asthmatic disease, on semen quality in men of subfertile couples 
Elsje C. Oostingh, Nicole A. Huijgen, Rivka Koedooder, Gert R. Dohle, Bruno HC Stricker, Régine PM Steegers-Theunissen 

Periconception, pregnancy and child outcomes

Systematic review of pregnancy outcomes after fertility-preserving treatment of uterine fibroids 
Shen Chuen Khaw, Richard A. Anderson, Man-wa Lui 

Pregnancy outcome after multifetal pregnancy reduction of triplets to twins versus reduction to singletons 
Roni Zemet, Jigal Haas, Yossi Bart, Eran Barzilay, Keren Zloto, Natan Argaman, Noa Schwartz, Boaz Weisz, Yoav Yinon, Shali Mazaki-Tovi, Shlomo Lipitz 

Guideline-based quality indicators for early pregnancy assessment units 
Merel M.J. van den Berg, Petra J. Hajenius, Femke Mol, Rosella P.M.G. Hermens, Fulco van der Veen, Mariette Goddijn, Emmy van den Boogaard 

Reproductive endocrinology and health

Ethnic discordance in serum anti-Müllerian hormone in healthy women: a population study from China and Europe 
Scott M. Nelson, Sun Aijun, Qui Ling, Xu Tengda, Xue Wei, Deng Yan, Wang Yanfang, Tian Zenghui, Chen Xinqi, Abigail Fraser, Gemma L. Clayton 

Replacing HMG/FSH by low-dose HCG to complete corifollitropin alfa stimulation reduces cost per clinical pregnancy: a randomized pragmatic trial 
Wim Decleer, Frank Comhaire, Jonas Balduyck, Alice Ameye, Kaan Osmanagaoglu, Paul Devroey