Defining the curve when initial levels of human chorionic gonadotropin in patients with spontaneous abortions are low
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Supported by grant R01-HD-36455-01A1 from National Institutes of Health.
PII: S0015-0282(05)03841-0
doi:10.1016/j.fertnstert.2005.08.012
© 2006 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.

