About me





Dr Tony Tan
MBBS (Singapore), MMED (O&G, Singapore), MRANZCOG (Australia, New Zealand), FRCOG (UK), FAMS (Singapore)

Dr Tony Tan obtained his MBBS in National University of Singapore in 1993 and his specialist qualifications in Obstetrics and Gynaecology in 2000. He was further trained in fetal medicine including twin pregnancies at Queen Charlotte's Hospital, London for a year till June 2003. He was a Consultant Obstetrician and Gynaecologist in the department of Department of Maternal Fetal Medicine, KK Women’s and Children’s Hospital till October 2006 and then Consultant Obstetrician and Gynaecologist and Clinical Director, Maternal Fetal Medicine, Raffles Hospital from November 2006 to June 2019.  He will be setting up his own clinic "Tony Tan Women and Fetal Clinic" in Mount Alvernia Hospital from 1st July 2019.

He specialises in the management of high-risk pregnancies. He has special interests in twin (both monochorionic and dichorionic) pregnancies, miscarriages, screening and diagnosis of fetal abnormalities, prevention and management of preterm labour, management of pre-eclampsia and intrauterine growth restriction and strategies to prevent stillbirth. He personally performs diagnostic scans during pregnancy with a high-resolution ultrasound machine (e.g. first trimester screening, second trimester fetal anomaly scan, and third trimester growth scan and Doppler studies) and performs invasive diagnostic procedures (e.g. amniocentesis, chorionic villus sampling).


He looks after low-risk pregnancies, and has been instrumental in developing the protocols based on the best evidences available that are used in the clinics and labour ward in Raffles Hospital, and also the patient counselling sheets for common obstetric procedures for the Obstetrical and Gynaecological Society of Singapore when he was the President.

Dr Tony Tan also looks after non-pregnant women. He does gynaecological screening for well women, screening for sexually transmitted infections, manages patients with fibroids, ovarian cysts, adenomyosis, endometriosis and pelvic inflammatory disease, and performs minor and major (both via the laparotomy or open and laparoscopic or minimally invasive approaches) gynaecological operations like hysteroscopy, dilatation and curettage, hysterectomy, myomectomy and ovarian cystectomy.

However, he does not perform assisted reproductive techniques like SO-IUI (superovulation in utero insemination) and IVF (in vitro fertilization), though he looks after the high-risk pregnancies resulting from SO-IUI and IVF.

He had published in academic journals and is regularly invited to give academic lectures to fellow obstetricians and gynaecologists at local, regional and international medical conferences regularly.

He was President of the Obstetrical and Gynaecological Society of Singapore in 2013-2014 and Chairman, Maternal Fetal Medicine Committee of the Asia-Oceanic Federation of Obstetricians and Gynaecologists in 2013-2017.

He is a fellow of the Royal College of Obstetricians and Gynaecologists in UK and Academy of Medicine, Singapore, and member of the Royal Australian and New Zealand College of Obstetricians and Gynaecologists. He is also an examiner for the MRCOG examinations and the Exit examinations for local OG trainees. He is a member of the Faculty of Medical Experts and has provided expert medical opinions for local obstetric medicolegal disputes.

My Scientific Publications


Indexed journals
1. Tan TYT, Teo KP, Tan KH. Antenatal HIV screening – Knowledge, Attitudes and Practices of obstetricians in KKH. Singapore Med J. 1999 Dec; 40(12):733-7. 
2. TYT Tan, GSH Yeo. Advances in Imaging in Prenatal Diagnosis and Fetal therapy. Ann Acad Med Singapore 2003; 32(3): 289-93.3. 
3. TYT Tan, W Sepulveda. Acardiac twin: a systematic review of minimally invasive treatment modalities. Ultrasound Obstet Gynecol 2003; 22(4): 409-19. 
4. HY Wee, TYT Tan, PC Khoo, P Agarwal, GSH Yeo. A case series of pre-viable severe twin-twin transfusion syndrome. Ann Acad Med Singapore 2003; 32(5):645-8.
5. MSK Lau, Tan JVK, Tan TYT, Gomez JM, GSH Yeo. Idiopathic chronic fetomaternal haemorrhage resulting in hydrops – a case report. Ann Acad Med Singapore 2003; 32(5): 642-4.
6. Tan TC, TYT Tan, KYC Kwek, JCS Tee, VS Rajadurai, GSH Yeo. Severe newborn encephalopathy unrelated to intrapartum hypoxic events: 3 case reports. Ann Acad Med Singapore 2003; 32(5): 653-7.
7. TY Tan, ML Denbow, PM Cox, D Talbert, NM Fisk. Occlusion of arterio-arterial anastomosis manifesting as acute twin-twin transfusion syndrome. Placenta 2004; 25(2-3): 238-42.
8. TYT Tan, MJO Taylor, L Wee, T Vanderheyden, R Wimalasundera, NM Fisk. Doppler of arterio-arterial anastomoses and stage-independent survival in twin twin transfusion. Obstetrics and Gynaecology 2004; 103: 1174-80.
9. KH Tan, TYT Tan, JVK Tan, I Tan, SK Chew, GSH Yeo. Birth Defects in Singapore 1994-2000. 2005 Oct; 46(10):545-52. Erratum in Singapore Med J. 2005 Dec; 46(12):740.
10. L Pasquini, A Fichera, T Tan, S Y Ho and H Gardiner. Left superior caval vein: a powerful indicator of fetal coarctation. Heart. 2005 Apr; 91(4):539-40.
11. TYT Tan, GSH Yeo. Intrauterine growth restriction. Curr Opin Obstet Gynecol. 2005 Apr; 17(2):135-142.
12. L Pasquini, Tony Tan, Siew Yen Ho, Helena Gardiner. Abnormal arrangement of abdominal vessels: implications for fetal outcome? Cardiology in The Young. December 2004.
13. Tan KB, Tan TY, Tan JV, Tan YL, Yeo GS. The amniotic sheet: a truly benign condition? Ultrasound Obstet Gynecol. 2005 Nov; 26(6): 639-43.
14. Lim YK, Tan TY, Zuzarte R, Daniel ML, Yeo GS. Outcomes of twin-twin transfusion syndrome managed by a specialised twin clinic. Singapore Med J. 2005 Aug; 46(8):401-6.
15. Vanderheyden TM, Fichera A, Pasquini L, Tan TY, Wee LY, Frusca T, Fisk NM. Increased latency of absent end-diastolic flow in the umbilical artery of monochorionic twin fetuses. Ultrasound Obstet Gynecol. 2005 Jul; 26(1)44-9.
16. Wong HF, Tan TYT, Kwek K, Low Y, Yeo SH. Intestinal atresia of co-twin after spontaneous cessation of blood flow through an acardiac twin – a case report. Singapore Med J 2007.
17. JCC Tien, TYT Tan. Non-surgical interventions for threatened and recurrent miscarriages. Singapore Med J 2007 Dec;48(12):1074-90.
18. Teoh XH, Tan TY, Chow KK, Lee IW. Prenatal diagnosis of cri-du-chat syndrome: importance of ultrasonographical markers. Singapore Med J. 2009 May;50(5):e181-4. 
19. Sin IL, Tan TY. Down syndrome in monochorionic twins. Singapore Med J. 2009 Jul;50(7):e264-7.

Non-indexed peer-reviewed journals
20. June Tan, Tony Tan. Preparing for the New MRCOG Examinations. 
a) KK Hospital Review March 2001; 4 (1):21-27.
b) Singapore Journal of Obstetrics and Gynaecology 2001. 
21. TYT Tan. Failed first trimester surgical termination of pregnancies – a review.
a) Singapore Journal of Obstetrics and Gynaecology 2003; 34 (2):1-5.
b) KK Hospital Review 2003; 6 (1): 13-16.
22. Lim YK, Tony YT Tan, Brenda Low, CS Tee. Post TOP urine pregnancy test – is it useful as a strategy to detect failed induced abortion? Singapore Journal of Obstetrics and Gynaecology 2003; 34(3): 11-16.
23. J Mohd, TYT Tan, GSH Yeo. Fetocide – current indications and practice. KK Review; July 2004; 7(1): 27-30.
24. TYT Tan. Intrauterine growth restriction. KK Review; Jul 05; 8(1):42-46.
25. R Zuzarte, TYT Tan, YL Yan, FM Lai, GSH Yeo. Fetal nasal bone – strongest soft marker for Down syndrome yet? KK Review; Dec 05; 8(2): 27-31.
26. XH Ong, TYT Tan, FM Lai, GSH Yeo. Down syndrome screening in twin pregnancies. a) KK Review; 2006; 9(1):25-28.b) Singapore Journal of Obstetrics and Gynaecology Nov 2004.
27. AWM Tan, TYT Tan, GSH Yeo. Mode of delivery for twins. 
a) KK Review; Dec 2005; 8(2):32-35.
b) Singapore Journal of Obstetrics and Gynaecology Nov 2004.
28. Tan TL, TYT Tan. First Trimester Screening for Down Syndrome. KK Review; 2006; 9(1): 18-24.
29. Koh VT, TYT Tan. Screening for chorionicity in twin pregnancies. KK Review 2006; 9(1):29-36.
30. RY Soh, TYT Tan, KH Tan, GSH Yeo. Screening for thalassaemia. KK Review 2006; 9(1):37-42.
31. XY Chen, TYT Tan, KH Tan. Screening for Antenatal Infections. KK Review 2006; 9(1):43-52.
32. HY Lim, TYT Tan, K Kwek. Screening for preeclampsia. KK Review 2006; 9(1): 72-76.
33. WT Koh, TYT Tan, HY Wee, GSH Yeo. Screening for Gestational Diabetes. KK Review 2006; 9(1): 77-83.


Letters
1. Tony YT Tan, Sara Paterson-Brown, Nicholas M Fisk. Prospective risk of stillbirth in multiple gestation pregnancies: a population-based analysis. Obstet Gynecol 2003; 101(5): 1023.
2. NM Fisk, TYT Tan, MJO Taylor. Stage-based treatment of twin twin transfusion syndrome. Am Journal Obstet Gynecol 2004; 190(5): 1489-1490. Republished in Am J Obstet Gynecol 2004;190(6):1809-10;

Chapters
1. E Thomas, GSH Yeo, TYT Tan. Haemoglobin Bart’s Hydrops Fetalis Syndrome. Chapter in Anesthetic and Obstetric Management of high risk pregnancy edited by Sanjay Datta 3rd Edition 2004.


Published Abstracts
1. TYT Tan, GSH Yeo. An audit of invasive prenatal diagnosis for Bart’s hydrops. Ultrasound in Obstetrics and Gynaecology 2001; 18 (Supp 1): 22.
2. KH Tan, YT Tan, J Tan, KH Teo, SK Chew, GSH Yeo. Notified birth defects in Singapore from 1994 to 1999. Ultrasound in Obstetrics and Gynaecology 2002; 20 (Supp 1): 26.
3. TYT Tan, K Kwek, GSH Yeo. Oral digoxin for supraventricular tachycardia in a monochorionic twin. Ultrasound in Obstetrics and Gynaecology 2002; 20 (Supp 1): 27.
4. TYT Tan, MJO Taylor, LY Wee, T Vanderheyden, NM Fisk. Doppler detection of arterio-arterial anastomosis predicts survival outcome independent of Quintero stage in TTTS. Ultrasound in Obstetrics and Gynaecology 2003; 22 (Supp 1): 61.
5. L Pasquini, TYT Tan, HM Gardiner. Fetal left atrial isomerism – an important predictor of neonatal complications with simple detection at standard abdominal biometry. Ultrasound in Obstetrics and Gynaecology 2003; 22 (Supp 1): 151.
6. A Fichera, T Vanderheyden, L Pasquini, T Tan, LY Wee, T Frusca, NM Fisk. Longer latency of AEDF in monochorionic twins. Ultrasound in Obstetrics and Gynaecology 2003; 22 (Supp 1): 162.
7. T Vanderheyden, L Pasquini, LY Wee, TYT Tan, R Wimalasundera, MJO Taylor, S Kumar, HM Gardiner, NM Fisk. Interstitial laser for vascular occlusion of fetal vasculature. Ultrasound in Obstetrics and Gynaecology 2003; 22 (Supp 1): 165.
8. T Tan, W Sepulveda. TRAP sequence: a systematic review of invasive treatment modalities. Ultrasound in Obstetrics and Gynaecology 2003; 22 (Supp 1): 166.
9. Chen JSC, Tan JVK, Tan TYT, Tan KH, Yeo GSH. Thickened Nuchal Fold (NF) In The Second Trimester: A Useful Marker? Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004.
10. Yan YL, Tan TYT, Tan JVK, Yeo GSH. Absent Nasal Bone And Its Association With Chromosomal Abnormalities. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004.
11. Khi CYM, Woo BH, Tan JVK, Tan TYT, Yeo GSH. Outcomes Of Hypoplastic Left Heart Syndrome. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004.
12. Lim YK, Zuzarte R, Tan TYT, Kwek K, Yeo GSH. Obstetric And Perinatal Outcomes Of Monochorionic Pregnancies Complicated By Twin-Twin Transfusion Syndrome Managed By A Specialised MC Pregnancy Clinic. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004.
13. Tan KH, Tan TYT, Tan JVK, Yeo GSH, Teo KH, Chew SK. Changing Trends of Congenital Anomalies in Singapore. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004 [Awarded Best Poster Presentation at the 1st International Scientific Meeting, ISUOG Singapore 2004].
14. Tan KH, Tan TYT, Tan JVK, Yeo GSH, Teo KH, Chew SK. Chromosomal Anomalies in Singapore from 1994 – 2000. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004.
15. Zuzarte R, Tan TYT, Tan JVK, Yeo GSH. Transient complete congenital heart block. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004.
16. Mohd J, Tan TYT, Kwek K, Yeo GSH. Endocardial Fibroelastosis as a Cause for Left Ventricular Aneurysm. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004.
17. Tan TYT, Yan YL, Cheung YB, Lai FM, Tan KH, Yeo GSH. Second Trimester Fetal Nasal Bone Length – Nomograms for Chinese and Malay Populations. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004.
18. Wong CP, Woo BH, Tan TYT, Tan JVK, Yeo GSH. Fetal Pyelectasis: Marker for Down syndrome and postnatal uropathy. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004. 
19. Lee JM, Tan TYT, Yeo GSH. Complication Rates for Fetal Ovarian Cyst Less Than 5 cm – A Review. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004.
20. Lau M, Tan JVK, Tan TYT, Kwek K, Yeo GSH. Idiopathic Chronic Fetomaternal Haemorrhage Resulting in Hydrops. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004.
21. Kuah S, Tan TYT, Tan JVK, Kwek K, Tan KH, Yeo GSH Yeo. Correlation of Vaginal Digital Examination and Intrapartum Sonography to determine Fetal Head Position in the Second Stage of Labour. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004.
22. Choey WY, Tan TYT, Kwek K, Yeo GSH. Non-immune Hydrops in Mid Trimester Pregnancy. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004.
23. Chin PS, Tan TYT, Kwek K, Yeo GSH. Oligohydramnios in An MCDA Twin : TTTS Vs ARPKD. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004.
24. Ng YW, Tan TYT, Kwek K, Yeo GSH. Conjoined Twins – Our Experience in Its Antenatal Management in KK Women’s & Children’s Hospital. Singapore Journal of Obstetrics & Gynaecology, Volume 35 (Supplement 1) 2004.
25. L Pasquini, A Fichera, T Tan, SY Ho, H Gardiner. Significance of left superior caval vein in the fetus. Ultrasound in Obstetrics and Gynecology, 2004, 24(3): 270.
26. JJ Chee, TYT Tan, GSH Yeo. Rapid amnioreduction using a reusable vacuum aspiration system in the treatment of polyhydramnios: the KK experience. Ultrasound in Obstetrics and Gynecology, 2004, 24(3): 281.
27. M Lau, TYT Tan, K Kwek, P Agarwal, GSH Yeo. Outcome of preterm premature rupture of membrane in twin pregnancies. Ultrasound in Obstetrics and Gynecology, 2004, 24(3): 341.

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