title: [Predictive value of vitamin D plasma levels on pregnancy rates in a cohort of  IVF patients].
abstract: OBJECTIVE
  To determine a possible correlation between plasma levels of vitamin D and pregnancy rates obtained by in vitro fertilization (IVF).
  
  
  METHODS
  One hundred and ninety-eight womens participated in an IVF cycle from January to May 2012 in a prospective study. During the follicular phase locking, serum fluid was collected for vitamin D, calcium, FSH and estradiol analysis. The serum bhCG was checked 16 days after oocyte collect. Clinical pregnancy was confirmed by transvaginal sonography with at least one gestational sac in the uterine cavity.
  
  
  RESULTS
  The mean levels of vitamin D was 31.7 nmol/L. A total of 169 patients (85.3%) had a vitamin D insufficiency (< 50 nmol/L). Only 29 patients (14.7%) had a sufficient vitamin D status (vitamin D 50 nmol/L). Pregnancy rate was 29.8% (59/198). There was no significant correlation between the levels of vitamin D and mean age (P = 0.92), BMI (P = 0.16) and etiology of infertility (P = 0.78). In contrast, the levels of vitamin D mean were significantly lower in patients from North Africa (P < 0.0001) and Black African (P = 0.0003) compared to Caucasian patients.
  
  
  CONCLUSIONS
  No correlation was found between serum vitamin D level and the pregnancy rate in IVF cycle.
authors.forename: C
authors.initials: C
authors.lastname: Trably
authors.forename: A
authors.initials: A
authors.lastname: Brosse
authors.forename: I
authors.initials: I
authors.lastname: Plotton
authors.forename: J
authors.initials: J
authors.lastname: Berthillier
authors.forename: P
authors.initials: P
authors.lastname: Du Mesnildot
authors.forename: S
authors.initials: S
authors.lastname: Hadj
authors.forename: J
authors.initials: J
authors.lastname: Lornage
authors.forename: B
authors.initials: B
authors.lastname: Salle
mesh_terms: D000328:Adult; D000352:Africa, Northern / Q000453:epidemiology; D044383:Black People; D005260:Female; D005307:Fertilization in Vitro; D005602:France; D006801:Humans; D007247:Infertility, Female / Q000209:etiology / Q000628:therapy*; D011247:Pregnancy; D018873:Pregnancy Rate; D011446:Prospective Studies; D016896:Treatment Outcome; D014807:Vitamin D / Q000097:blood*; D044465:White People
chemical_list: D014807:Vitamin D