Fertility and Sterility
Volume 82, Issue 4 , Pages 986-987 , October 2004

Reply of the authors:

Received 6 May 2004

References 

  1. Mueller MD , Raio L , Spoerri S , Ghezzi F , Dreher E , Bersinger NA . Novel placental and nonplacental serum markers in ectopic versus normal intrauterine pregnancy . Fertil Steril . 2004;81:1106–1111
  2. Sinosich MJ , Zakher A . Pregnancy-associated plasma protein A interaction with heparin: a critical appraisal . Gynecol Obstet Invest . 1991;32:72–77
  3. Toop KM , Klopper A . Effect of anticoagulants on the measurement of pregnancy-associated plasma protein A (PAPP-A) . Br J Obstet Gynaecol . 1983;90:150–155
  4. Spencer K . The influence of different sample collection types on the levels of markers used for Down's syndrome screening as measured by the Kryptor immunoassay system . Ann Clin Biochem . 2003;40:166–168

PII: S0015-0282(04)01303-2

doi: 10.1016/j.fertnstert.2004.07.003

Fertility and Sterility
Volume 82, Issue 4 , Pages 986-987 , October 2004

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