title: Maternal serum oestrogen and androgen concentrations in preeclamptic and uncomplicated pregnancies.
abstract: BACKGROUND
  Epidemiological studies show a substantially reduced risk of breast cancer in adult daughters of preeclamptic pregnancies, and modest risk reductions have been demonstrated for mothers also. Alterations in pregnancy hormone concentrations, particularly lower in utero exposure to oestrogen, are hypothesized to mediate this association.
  
  
  METHODS
  Pregnancy hormone concentrations were measured in maternal sera collected at hospital admission for labour and delivery from 86 preeclamptic and 86 uncomplicated, singleton pregnancies matched on length of gestation, maternal age, parity, and type of delivery.
  
  
  RESULTS
  Case and control pregnancies were similar in several maternal and pregnancy factors. Serum unconjugated oestradiol, oestrone, and oestriol concentrations were not lower in preeclamptic pregnancies in a matched analysis with adjustment for race and whether blood was collected before or after labour commenced. Serum unconjugated androstenedione (506.3 versus 316.0 ng/dl; P = 0.0007) and testosterone concentrations (214.5 versus 141.9 ng/dl; P = 0.004), however, were significantly higher in preeclamptic compared with control pregnancies, whereas dehydroepiandrosterone (DHEA) and DHEA sulphate did not differ.
  
  
  CONCLUSIONS
  These data do not support the hypothesis that cancer risk in mothers and offspring of preeclamptic pregnancies is explained by exposure to lower maternal blood oestrogen concentrations, but raise the possibility that androgens play a role.
authors.affiliation: Epidemiology and Biostatistics Program, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD 20892-7246, USA. troisir@mail.nih.gov
authors.forename: Rebecca
authors.initials: R
authors.lastname: Troisi
authors.forename: Nancy
authors.initials: N
authors.lastname: Potischman
authors.forename: James M
authors.initials: JM
authors.lastname: Roberts
authors.forename: Roberta
authors.initials: R
authors.lastname: Ness
authors.forename: William
authors.initials: W
authors.lastname: Crombleholme
authors.forename: David
authors.initials: D
authors.lastname: Lykins
authors.forename: Pentti
authors.initials: P
authors.lastname: Siiteri
authors.forename: Robert N
authors.initials: RN
authors.lastname: Hoover
mesh_terms: D000328:Adult; D000728:Androgens / Q000097:blood*; D001943:Breast Neoplasms / Q000097:blood / Q000209:etiology; D016022:Case-Control Studies; D004967:Estrogens / Q000097:blood*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007743:Labor, Obstetric / Q000097:blood; D008297:Male; D011225:Pre-Eclampsia / Q000097:blood*; D011247:Pregnancy; D012307:Risk Factors
chemical_list: D000728:Androgens; D004967:Estrogens