Human Reproduction, Vol. 14, No. 11, 2868-2871,
November 1999
© 1999 European Society of Human Reproduction and Embryology
A longitudinal study of pregnancy outcome following idiopathic recurrent miscarriage
Department of Obstetrics and Gynaecology, Miscarriage Clinic, Liverpool Women's Hospital, Crown Street, Liverpool L8 7SS, UK
Recurrent miscarriage is a difficult clinical problem occurring in ~1–2% of fertile women. Following investigation, most cases fail to reveal an identifiable cause and are therefore classified as idiopathic. The aim of this study was to identify important gestational milestones for pregnancy success prediction in women following idiopathic recurrent miscarriage. A total of 325 consecutive patients with idiopathic recurrent miscarriage was involved in a prospective longitudinal observational study. Patients were identified from a miscarriage database of 716 patients. Preconceptual presentation and investigation excluded patients from the study sample with known associations of recurrent pregnancy loss, such as antiphosholipid syndrome, oligomenorrhoea, mid-trimester loss and other rare causes, e.g. abnormal parental karyotype. Following early presentation in a subsequent pregnancy, all patients followed a standard clinic protocol including fetal viability ultrasonography on a fortnightly basis throughout the first trimester. Kaplan–Meier curves were constructed for pregnancy outcome. Out of 325 idiopathic cases, 70% (n = 226) conceived, with a 75% success rate. Of 55 miscarriages, longitudinal assessment showed that six losses occurred following detection of fetal cardiac activity (3%). Data from this large study group have enabled accurate prediction of future pregnancy success and have established important gestational milestones for women with idiopathic recurrent miscarriage.
Key words: fetal cardiac activity/idiopathic recurrent miscarriage/pregnancy outcome
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