title: Live birth rate according to maternal age and previous number of recurrent miscarriages.
abstract: OBJECTIVE
  In Japan, marital age and women's age at the first pregnancy are continuing to increase year by year. However, information concerning subsequent live birth rate according to maternal age and number of previous recurrent miscarriages is limited.
  
  
  METHODS
  We studied a total of 1250 unexplained patients suffering two or more consecutive miscarriages. We examined the live birth rate at the first pregnancy and the cumulative success rate for birth of at least one child after examination.
  
  
  RESULTS
  The live birth rate of women in their 40s was 58.1%, which was similar to that of women who were 35-39 years old (58.4%) at the first pregnancy, as found after examination. From logistic regression, women's age and the number of previous miscarriages independently decreased the live birth rate in subsequent pregnancies (p(s)) as well as cumulative pregnancies (p(c)), as follows: logit (p(s)) = 3.964 - 0.0652 x (age) - 0.408 x (previous number of miscarriages), logit(p(c)) = 6.806 - 0.1130 x (age) - 0.514 x (previous number of miscarriages).
  
  
  CONCLUSIONS
  The information concerning the live birth rate can be given to each patient before subsequent pregnancy.
authors.affiliation: Department of Obstetrics and Gynecology, Nagoya City University, Graduate School of Medical Sciences, Nagoya, Japan. og.mym@med.nagoya-cu.ac.jp
authors.forename: Mayumi
authors.initials: M
authors.lastname: Sugiura-Ogasawara
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Ozaki
authors.forename: Tamao
authors.initials: T
authors.lastname: Kitaori
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Suzumori
authors.forename: Shintaro
authors.initials: S
authors.lastname: Obayashi
authors.forename: Sadao
authors.initials: S
authors.lastname: Suzuki
mesh_terms: D000026:Abortion, Habitual / Q000453:epidemiology* / Q000503:physiopathology / Q000628:therapy; D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D007564:Japan; D008423:Maternal Age; D008875:Middle Aged; D011247:Pregnancy; D018873:Pregnancy Rate; D012307:Risk Factors