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Occult abnormal pregnancies after first post-embryo transfer serum beta-human chorionic gonadotropin levels of 1.0-5.0 mIU/mL.

Abstract：

OBJECTIVE:To assess the occult pregnancy rate after "negative" first post-embryo transfer (ET) serum β-hCG results. DESIGN:Two-part retrospective cohort study and nested case series. SETTING:University-based fertility center. PATIENT(S):A total of 1,571 negative first post-ET serum β-hCG results were included in the study; 1,326 results (primary cohort, June 2009-December 2013) were initially reported as <5 mIU/mL and 245 results (secondary cohort, January 2014-March 2015) were reported as discrete values from 1.0 to 5.0 mIU/mL. INTERVENTION(S):None. MAIN OUTCOME MEASURE(S):Rates of occult pregnancy, ectopic pregnancy, and complications after negative first post-ET serum β-hCG results. RESULT(S):A total of 88.8% (1,178/1,326) of the negative first post-ET results reported as <5 were actually <1.0 mIU/mL. Occult pregnancy was incidentally identified in 1.2% (12/1,041) of subjects with follow-up. Six had ectopic pregnancies, and seven experienced serious complications; 11 (91.7%) of the 12 occult pregnancies had a first post-ET serum β-hCG level of 1.0-5.0 mIU/mL and 1 (8.3%) <1.0 mIU/mL. All pregnancies with serious complications had initial β-hCG levels of 1.0-5.0 mIU/mL. Of the 245 results reported as discreet values, occult pregnancies were diagnosed in 5.5% (9/163) of subjects with follow-up. One had an ectopic pregnancy, which was treated with methotrexate. There were no serious complications in the secondary cohort. CONCLUSION(S):The majority of negative first post-ET serum β-hCG levels are <1.0 mIU/mL. Results from 1.0 to 5.0 mIU/mL may fail to exclude abnormal pregnancy and are associated with poor outcomes compared with β-hCG levels <1.0 mIU/mL. Serial serum β-hCG may be warranted in this population.

journal_name

Fertil Steril

journal_title

Fertility and sterility

authors

Maslow BS,Bartolucci A,Sueldo C,Engmann L,Benadiva C,Nulsen JC 3rd

doi

10.1016/j.fertnstert.2015.11.049

subject

Has Abstract

pub_date

2016-04-01 00:00:00

pages

938-945.e1

issue

eissn

0015-0282

issn

1556-5653

pii

S0015-0282(15)02133-0

journal_volume

105

pub_type

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Occult abnormal pregnancies after first post-embryo transfer serum beta-human chorionic gonadotropin levels of 1.0-5.0 mIU/mL.