Abortion, Habitual

• Department of Obstetrics, Women's Diseases and Oncological Gynecology, Nicolaus Copernicus University — Bydgoszcz, Kuyavian-Pomeranian Voivodeship, Poland
• 1st Department of Obstetrics and Gynecology, Center of Postagraduate Medical Education — Warsaw, Masovian Voivodeship, Poland
• Department of Obstetrics, Perinatology and Neonatology, Center of Postagraduate Medical Education — Warsaw, Masovian Voivodeship, Poland
• 1st Department of Obstetrics and Gynecology, Medical University of Warsaw — Warsaw, Masovian Voivodeship, Poland

• İstanbul Başakşehir Çam ve Sakura City Hospital — Istanbul, Basaksehir, Turkey (Türkiye)

Not specified

• Tufts Medical Center — Boston, Massachusetts, United States

• National University of Malaysia — Cheras, Kuala Lumpur, Malaysia

• Hôpital Femme Mère Enfant (HFME) - Hospices Civils de Lyon — Bron, France
• Hôpital de la Croix Rousse - Hospices Civils de Lyon — Lyon, France
• Centre Hospitalier Lyon Sud (CHLS) - Hospices Civils de Lyon — Pierre-Bénite, France

• Hospital Vall d'Hebron — Barcelona, Spain

• Maria da Conceição Souto Maior — Recife, Pernambuco, Brazil

• Tufts Medical Center — Boston, Massachusetts, United States

• Division of Maternal Fetal Medicine — New Brunswick, New Jersey, United States
• High Risk Obstetrics Clinic — New Brunswick, New Jersey, United States