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External validation of models to predict the outcome of pregnancies of unknown location: a multicentre cohort study.
Published in:
BJOG: An International Journal of Obstetrics & Gynaecology, 2021, v. 128, n. 3, p. 552, doi. 10.1111/1471-0528.16497
By:
- Christodoulou, E;
- Bobdiwala, S;
- Kyriacou, C;
- Farren, J;
- Mitchell‐Jones, N;
- Ayim, F;
- Chohan, B;
- Abughazza, O;
- Guruwadahyarhalli, B;
- Al‐Memar, M;
- Guha, S;
- Vathanan, V;
- Gould, D;
- Stalder, C;
- Wynants, L;
- Timmerman, D;
- Bourne, T;
- Van Calster, B
Publication type:
Article
OC15.02: Development, validation and comparison of models predicting outcomes in pregnancies of unknown location using regression and machine learning models.
Published in:
Ultrasound in Obstetrics & Gynecology, 2024, v. 64, p. 39, doi. 10.1002/uog.27823
By:
- Kyriacou, C.;
- Ledger, A.;
- Bobdiwala, S.;
- Ayim, F.;
- Kirk, E.;
- Abughazza, O.;
- Guha, S.;
- Vathanan, V.;
- Gould, D.;
- Timmerman, D.;
- Van Calster, B.;
- Bourne, T.
Publication type:
Article
Updating M6 pregnancy of unknown location risk‐prediction model including evaluation of clinical factors.
Published in:
Ultrasound in Obstetrics & Gynecology, 2024, v. 63, n. 3, p. 408, doi. 10.1002/uog.27515
By:
- Kyriacou, C.;
- Ledger, A.;
- Bobdiwala, S.;
- Ayim, F.;
- Kirk, E.;
- Abughazza, O.;
- Guha, S.;
- Vathanan, V.;
- Gould, D.;
- Timmerman, D.;
- Van Calster, B.;
- Bourne, T.;
- Pikovsky, M.;
- Mitchell‐Jones, N.;
- Parker, N.;
- Barcroft, J.;
- Kapur, S.;
- Chohan, B.;
- Guruwadahyarhalli, B.;
- Stalder, C.
Publication type:
Article
OC08.06: *Updating and improving the M6 pregnancy of unknown location risk prediction model with clinical variables.
Published in:
Ultrasound in Obstetrics & Gynecology, 2022, v. 60, p. 25, doi. 10.1002/uog.25053
By:
- Kyriacou, C.;
- Ledger, A.;
- Bobdiwala, S.;
- Pikovsky, M.;
- Parker, N.;
- Farren, J.;
- Mitchell‐Jones, N.;
- Ayim, F.;
- Chohan, B.;
- Guha, S.;
- Kirk, E.;
- Abughazza, O.;
- Al‐Memar, M.;
- Vathanan, V.;
- Gould, D.;
- Stalder, C.;
- Timmerman, D.;
- Van Calster, B.;
- Bourne, T.
Publication type:
Article
OC09.04: Assessing progesterone cut‐off levels in pregnancies classified as a pregnancy of unknown location using transvaginal ultrasonography.
Published in:
Ultrasound in Obstetrics & Gynecology, 2020, v. 56, p. 26, doi. 10.1002/uog.22262
By:
- Kyriacou, C.;
- Bobdiwala, S.;
- Doulgeraki, T.;
- Fourie, H.;
- Farren, J.;
- Mitchell‐Jones, N.;
- Ayim, F.;
- Chohan, B.;
- Guha, S.;
- Kirk, E.;
- Abhugazza, O.;
- Al‐Memar, M.;
- Vathanan, V.;
- Gould, D.;
- Stalder, C.;
- Timmerman, D.;
- Bourne, T.
Publication type:
Article
Triaging women with pregnancy of unknown location using two-step protocol including M6 model: clinical implementation study.
Published in:
2020
By:
- Bobdiwala, S.;
- Christodoulou, E.;
- Farren, J.;
- Mitchell‐Jones, N.;
- Kyriacou, C.;
- Al‐Memar, M.;
- Ayim, F.;
- Chohan, B.;
- Kirk, E.;
- Abughazza, O.;
- Guruwadahyarhalli, B.;
- Guha, S.;
- Vathanan, V.;
- Bottomley, C.;
- Gould, D.;
- Stalder, C.;
- Timmerman, D.;
- Calster, B.;
- Bourne, T.;
- Mitchell-Jones, N
Publication type:
journal article
OC16.04: External validation of the M6 model and the two‐step triage system for pregnancies of unknown location.
Published in:
Ultrasound in Obstetrics & Gynecology, 2019, v. 54, p. 40, doi. 10.1002/uog.20529
By:
- Christodoulou, E.;
- Bobdiwala, S.;
- Kyriacou, C.;
- Farren, J.;
- Mitchell‐Jones, N.;
- Ayim, F.;
- Chohan, B.;
- Abhugazza, O.;
- Guruwadahyarhalli, B.;
- Al‐Memar, M.;
- Guha, S.;
- Vathanan, V.;
- Gould, D.;
- Stalder, C.;
- Wynants, L.;
- Timmerman, D.;
- Bourne, T.;
- Van Calster, B.
Publication type:
Article
OC16.01: The role of human chorionic gonadotrophin and transvaginal ultrasound in pregnancies of unknown location beyond 48 hours.
Published in:
Ultrasound in Obstetrics & Gynecology, 2019, v. 54, p. 38, doi. 10.1002/uog.20526
By:
- Kyriacou, C.;
- Bobdiwala, S.;
- Elkington, I.;
- Farren, J.;
- Mitchell‐Jones, N.;
- Ayim, F.;
- Chohan, B.;
- Guha, S.;
- Kirk, E.;
- Abughazza, O.;
- Al‐Memar, M.;
- Vathanan, V.;
- Gould, D.;
- Stalder, C.;
- Timmerman, D.;
- Bourne, T.
Publication type:
Article
OC19.05: Evaluating cut‐off values for progesterone, single hCG and hCG ratio to define pregnancy viability and location in women with a pregnancy of unknown location (PUL).
Published in:
Ultrasound in Obstetrics & Gynecology, 2018, v. 52, p. 46, doi. 10.1002/uog.19335
By:
- Bobdiwala, S.;
- Christodoulou, E.;
- Kyriacou, C.;
- Farren, J.;
- Mitchell‐Jones, N.;
- Ayim, F.;
- Chohan, B.;
- Abughazza, O.;
- Guruwadahyarhalli, B.;
- Al‐Memar, M.;
- Guha, S.;
- Vathanan, V.;
- Bottomley, C.;
- Gould, D.;
- Stalder, C.;
- Timmerman, D.;
- Van Calster, B.;
- Bourne, T.
Publication type:
Article
OC01.04: A multicentre trial on the performance of a two‐step triage protocol based on initial serum progesterone and serial hCG used to manage pregnancies of unknown location (PUL).
Published in:
Ultrasound in Obstetrics & Gynecology, 2018, v. 52, p. 2, doi. 10.1002/uog.19210
By:
- Bobdiwala, S.;
- Christodoulou, E.;
- Farren, J.;
- Mitchell‐Jones, N.;
- Ayim, F.;
- Chohan, B.;
- Abughazza, O.;
- Guruwadahyarhalli, B.;
- Al‐Memar, M.;
- Guha, S.;
- Vathanan, V.;
- Bottomley, C.;
- Gould, D.;
- Stalder, C.;
- Timmerman, D.;
- Van Calster, B.;
- Bourne, T.
Publication type:
Article
OP11.02: Endometrial thickness and its value in triaging women with a pregnancy of unknown location.
Published in:
Ultrasound in Obstetrics & Gynecology, 2017, v. 50, p. 80, doi. 10.1002/uog.17790
By:
- Bobdiwala, S.;
- Farren, J.;
- Mitchell-Jones, N.;
- Ayim, F.;
- Abughazza, O.;
- Al-Memar, M.;
- Bottomley, C.;
- Gould, D.;
- Stalder, C.;
- Timmerman, D.;
- Bourne, T.
Publication type:
Article
Can risk factors, clinical history and symptoms be used to predict risk of ectopic pregnancy in women attending an early pregnancy assessment unit?
Published in:
2016
By:
- AYIM, F.;
- TAPP, S.;
- GUHA, S.;
- AL-MEMAR, M.;
- SAYASNEH, A.;
- STALDER, C.;
- BOURNE, T.;
- AMEYE, L.;
- TIMMERMAN, D.;
- BOTTOMLEY, C.;
- GOULD, D.
Publication type:
journal article
Can risk factors, clinical history and symptoms be used to predict risk of ectopic pregnancy in women attending an early pregnancy assessment unit?
Published in:
Ultrasound in Obstetrics & Gynecology, 2016, v. 48, n. 5, p. 656, doi. 10.1002/uog.16007
By:
- Ayim, F.;
- Tapp, S.;
- Guha, S.;
- Ameye, L.;
- Al-Memar, M.;
- Sayasneh, A.;
- Bottomley, C.;
- Gould, D.;
- Stalder, C.;
- Timmerman, D.;
- Bourne, T.
Publication type:
Article
OC13.01: The role of progesterone for the prediction of viability in pregnancies of unknown location ( PUL): a multicentre study.
Published in:
Ultrasound in Obstetrics & Gynecology, 2016, v. 48, p. 23, doi. 10.1002/uog.16088
By:
- Bobdiwala, S.;
- Farren, J.;
- Mitchell-Jones, N.;
- Al-Memar, M.;
- Ayim, F.;
- Chohan, B.;
- Guruwadahyarhalli, B.;
- Taheri, M.;
- Abughazza, O.;
- Guha, S.;
- Vathanan, V.;
- Bottomley, C.;
- Ahmed, S.;
- Gould, D.;
- Sur, S.;
- Stalder, C.;
- Timmerman, D.;
- Van Calster, B.;
- Bourne, T.
Publication type:
Article
OP18.02: A multicentre study to predict outcome in pregnancies of unknown location ( PUL): the role of the bleeding score.
Published in:
Ultrasound in Obstetrics & Gynecology, 2016, v. 48, p. 108, doi. 10.1002/uog.16327
By:
- Bobdiwala, S.;
- Farren, J.;
- Mitchell-Jones, N.;
- Al-Memar, M.;
- Ayim, F.;
- Chohan, B.;
- Guruwadahyarhalli, B.;
- Taheri, M.;
- Abughazza, O.;
- Guha, S.;
- Vathanan, V.;
- Bottomley, C.;
- Ahmed, S.;
- Gould, D.;
- Sur, S.;
- Stalder, C.;
- Timmerman, D.;
- Van Calster, B.;
- Bourne, T.
Publication type:
Article
Abstracts of the 26th World Congress on Ultrasound in Obstetrics and Gynecology, Rome, Italy, 24-28 September 2016.
Published in:
2016
By:
- Al-Memar, M.;
- Tapp, S.;
- Ayim, F.;
- Guha, S.;
- Ameye, L.;
- Sayasneh, A.;
- Bottomley, C.;
- Gould, D.;
- Stalder, C.;
- Timmerman, D.;
- Bourne, T.
Publication type:
journal article
Abstracts of the 26th World Congress on Ultrasound in Obstetrics and Gynecology, Rome, Italy, 24-28 September 2016.
Published in:
2016
By:
- Bobdiwala, S.;
- Farren, J.;
- Mitchell-Jones, N.;
- Al-Memar, M.;
- Ayim, F.;
- Chohan, B.;
- Guruwadahyarhalli, B.;
- Taheri, M.;
- Abughazza, O.;
- Guha, S.;
- Vathanan, V.;
- Bottomley, C.;
- Ahmed, S.;
- Gould, D.;
- Sur, S.;
- Stalder, C.;
- Timmerman, D.;
- Van Calster, B.;
- Bourne, T.
Publication type:
journal article
The clinical performance of the M4 decision support model to triage women with a pregnancy of unknown location as at low or high risk of complications.
Published in:
2016
By:
- Bobdiwala, S.;
- Guha, S.;
- Van Calster, B.;
- Ayim, F.;
- Mitchell-Jones, N.;
- Al-Memar, M.;
- Mitchell, H.;
- Stalder, C.;
- Bottomley, C.;
- Kothari, A.;
- Timmerman, D.;
- Bourne, T.
Publication type:
journal article
Triaging pregnancies of unknown location: the performance of protocols based on single serum progesterone or repeated serum hCG levels.
Published in:
2014
By:
- Guha, S;
- Ayim, F;
- Ludlow, J;
- Sayasneh, A;
- Condous, G;
- Kirk, E;
- Stalder, C;
- Timmerman, D;
- Bourne, T;
- Van Calster, B
Publication type:
Journal Article
Triaging pregnancies of unknown location: the performance of protocols based on single serum progesterone or repeated serum hCG levels.
Published in:
Human Reproduction, 2014, v. 29, n. 5, p. 938, doi. 10.1093/humrep/deu045
By:
- Guha, S.;
- Ayim, F.;
- Ludlow, J.;
- Sayasneh, A.;
- Condous, G.;
- Kirk, E.;
- Stalder, C.;
- Timmerman, D.;
- Bourne, T.;
- Van Calster, B.
Publication type:
Article
P16.14: Scar pregnancy: a diagnostic and management enigma.
Published in:
Ultrasound in Obstetrics & Gynecology, 2010, v. 36, n. S1, p. 232, doi. 10.1002/uog.8532
By:
- Al-Memar, M.;
- Jaspal, R.;
- Taylor-Clarke, M.;
- Ayim, F.;
- Al-Zouebi, A.;
- Kothari, A.;
- Sawant, S.
Publication type:
Article

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