title: Consecutive repeat miscarriages are likely to occur in the same gestational period.
abstract: This is a retrospective, observational study to determine how often repeated consecutive miscarriages occur consistently in the same gestational period, including 1589 miscarriages among 543 women with recurrent miscarriage. In women who had two miscarriages only, 49.17% of both miscarriages occurred in the same gestational period, which was significantly higher than the expected probability of 34.54% (P<0.01). The proportions of all miscarriages occurring in the same gestational period in women with three, four and five or more miscarriages were 28.72%, 19.44% and 18.60%, compared with the expected probabilities of 14.36% (P<0.01), 6.57% (P<0.05) and <3.15% (P<0.05). The proportions of miscarriages occurring consistently in the same gestational period are higher than the theoretical probabilities calculated for the whole population.
authors.affiliation: Centre for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan 250021, China.
authors.forename: Junhao
authors.initials: J
authors.lastname: Yan
authors.forename: Sotirios H
authors.initials: SH
authors.lastname: Saravelos
authors.forename: Ning
authors.initials: N
authors.lastname: Ma
authors.forename: Caihong
authors.initials: C
authors.lastname: Ma
authors.forename: Zi-Jiang
authors.initials: ZJ
authors.lastname: Chen
authors.forename: Tin-Chiu
authors.initials: TC
authors.lastname: Li
mesh_terms: D000026:Abortion, Habitual / Q000453:epidemiology*; D000328:Adult; D005260:Female; D005865:Gestational Age; D006801:Humans; D015994:Incidence; D015233:Models, Statistical; D008962:Models, Theoretical; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D011263:Pregnancy Trimester, Third; D012189:Retrospective Studies