Dr Jonathan Lai is a consultant obstetrician and sub-specialist in maternal and fetal medicine. His NHS practice is based at St Mary’s Hospital and he continues to deliver care for complex fetal conditions across both Imperial and Kings College Hospitals.

Jonathan graduated from Imperial College and subsequently continued his training in Australia before returning to specialise in obstetrics and gynaecology across London. He has extensive experience in large screening studies for pre-eclampsia and completed his MD thesis under the supervision of Professor Nicolaides. He has published in many peer reviewed journals within this field and in the classification of pre-eclampsia. He embarked on an academic training pathway in the North West Thames region, publishing work in fetal physiology and monitoring of fetal well-being. After completing his core training, he returned to King’s College Hospital for sub-specialist training before being appointed there as a consultant. He was lead for preterm birth in addition to his work in fetal medicine and obstetrics. He has returned to St Mary's with his primary role in maternal and fetal medicine, and is also the lead for fetal monitoring teaching for the multi-disciplinary team.


Fetal medicine, obstetrics, maternal medicine, maternity

Research & publications

  • Lai J, Syngelaki A, Nicolaides KH, von Dadelszen P, Magee LA. Using ultrasound and angiogenic markers at a 19-23 week assessment to inform the subsequent diagnosis of preeclampsia. Am J Obstet Gynecol. 2022
  • Lai J, Romero R, Tarca AL, Iliodromiti S, Rehal A, Banerjee A, Yu C, Peeva G, Palaniappan V, Tan L, Mehta M, Nicolaides KH. SARS-CoV-2 and the subsequent development of preeclampsia and preterm birth: evidence of a dose-response relationship supporting causality. Am J Obstet Gynecol. 2021 Dec;225(6):689-693.e1.
  • Lai J, Syngelaki A, Nicolaides KH, von Dadelszen P, Magee LA. Impact of new definitions of preeclampsia at term on identification of adverse maternal and perinatal outcomes. Am J Obstet Gynecol. 2020 Nov 6:S0002-9378(20)31286-2.
  • Lai J, Nowlan N, Vaidyanathan R, Visser G, Lees C. Fetal movements assessed by the actograph in relation to fetal Doppler and cardiotocograph Journal of Fetal and Neonatal Medicine. 2019 Mar 5:1-6.
  • Lai J, Woodward R, Alexandrov Y, Munnee A, Lees CC, Vaidyanathan R, Nowlan NC. A Novel, Wearable Fetal Movement Monitor based on Acoustic Sensing. Plos One. Mar 2018
  • Lai J, Nowlan NC, Vaidyanathan R, Shaw CJ, Lees CC. Fetal movements as a predictor of health. Acta Obstet Gynecol Scand. 2016 Sep;95(9):968-75. doi: 10.1111/aogs.12944.
  • Lai J, Garcia-Tizon Larroca S, Peeva G, Poon LC, Wright D, Nicolaides KH: Competing Risks Model in Screening for Preeclampsia by Serum Placental Growth Factor and Soluble fms-Like Tyrosine Kinase-1 at 30-33 Weeks' Gestation. Fetal Diagn Ther. 2014;35(4):240-8. doi: 10.1159/000359968. Epub 2014 May 17.
  • Lai J, Poon LCY, Pinas A, Bakalis S, Nicolaides KH: Uterine artery Doppler at 30–33 weeks’ gestation in the prediction of preeclampsia. Fetal Diagn Ther. 2013;33:156-63
  • Lai J, Syngelaki A, Poon LCY, Nucci M, Nicolaides KH: Maternal serum soluble endoglin (sEng) at 30-33 weeks in the prediction of preeclampsia. Fetal Diagn Ther. 2013;33:149-55.
  • Lai J, Pinas A, Syngelaki A, Poon LCY, Nicolaides KH: Maternal serum activin-A at 30-33 weeks in the prediction of preeclampsia: J Matern Fetal Neonatal Med. 2013 May;26:733-7.
  • Lai J, Poon LCY, Bakalis S, Chiriac R, Nicolaides KH: Mean arterial pressure at 30–33 weeks in the prediction of preeclampsia. Fetal Diagn Ther. 2013;33:173-81
  • Lai J, Pinas A, Poon LCY, Agathokleous M, Nicolaides KH: Maternal serum PLGF, PAPP-A and free β-hCG at 30-33 weeks in the prediction of preeclampsia. Fetal Diagn Ther. 2013;33:164-72
  • Poon LC, Syngelaki A, Akolekar R, Lai J, Nicolaides KH.Combined Screening for Preeclampsia and Small for Gestational Age at 11-13 Weeks. Fetal Diagn Ther. 2013;33(1):16-27.

Private practice

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