Utility of βhCG monitoring in the follow-up of medical management of miscarriage

Petersen, Scott G. , Perkins, Anneliese R. , Gibbons, Kristen S., Bertolone, Julia I. and Mahomed, Kassam (2017) Utility of βhCG monitoring in the follow-up of medical management of miscarriage. Australian and New Zealand Journal of Obstetrics and Gynaecology, . doi:10.1111/ajo.12607


Author Petersen, Scott G.
Perkins, Anneliese R.
Gibbons, Kristen S.
Bertolone, Julia I.
Mahomed, Kassam
Title Utility of βhCG monitoring in the follow-up of medical management of miscarriage
Journal name Australian and New Zealand Journal of Obstetrics and Gynaecology   Check publisher's open access policy
ISSN 1479-828X
0004-8666
Publication date 2017-03-27
Sub-type Article (original research)
DOI 10.1111/ajo.12607
Open Access Status Not yet assessed
Total pages 8
Place of publication Richmond, VIC, Australia
Publisher Wiley-Blackwell Publishing Asia
Collection year 2018
Language eng
Formatted abstract
Objective: To evaluate the percentage change in total βeta-unit human chorionic gonadotropin (βhCG) levels (%ΔβhCG) in the prediction of treatment outcomes following intravaginal misoprostol for missed miscarriage before 13 weeks.

Methods: A secondary analysis of a randomised controlled study of medical management of miscarriage was performed. Total βhCG levels were collected before misoprostol (baseline) and after a planned seven day interval (follow-up), when a transvaginal ultrasound (TVUS) reported a gestational sac as present or not. If no sac at TVUS, surgery was indicated on clinical criteria. %ΔβhCG ((baseline βhCG - follow-up βhCG)/baseline βhCG × 100) was evaluated in the prediction of a sac at TVUS and surgery on clinical criteria.

Results: %ΔβhCG was calculated for cases with βhCG levels within two days of misoprostol and TVUS; calculation interval determined case number. The median %ΔβhCG for 24 cases with a persistent sac (6-9 day interval) was significantly lower than for 145 with no sac (58.75% (interquartile range (IQR): 37.59-76.69; maximum 86.54) vs 97.65% (IQR: 95.44-98.43); P < 0.0001). The median %ΔβhCG for eight cases needing surgery on clinical criteria (5-9 day interval) was significantly lower than for 140 cases with no sac not needing surgery (79.68% (IQR: 64.63-91.15; maximum 94.06) vs 97.68% (IQR: 95.61-98.50); P < 0.0001). The area under the receiver-operator curve was 0.975 for prediction of a persistent sac and 0.944 for prediction of surgery on clinical criteria, respectively. %ΔβhCG > 87% predicted no sac at TVUS. %ΔβhCG > 94.5% predicted no surgery on clinical criteria.

Conclusion: %ΔβhCG calculation over one week reliably predicted treatment outcomes after medical management of missed miscarriage.
Keyword BhCG
Gestational trophoblastic disease
Medical management
Miscarriage
Misoprostol
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Mater Research Institute-UQ (MRI-UQ)
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