Andrietti S, Silva M, Wright A, Wright D, Nicolaides KH Competing-risks model in screening for pre-eclampsia by maternal factors and biomarkers at 35-37 weeks' gestation. Ultrasound Obstet Gynecol. 2016 Jul;48(1):72-9. doi: 10.1002/uog.15812. Epub 2016 May 30.
Cedars MI, Taymans SE, DePaolo LV, Warner L, Moss SB, Eisenberg ML The sixth vital sign: what reproduction tells us about overall health. Proceedings from a NICHD/CDC workshop. Hum Reprod Open. 2017 Jul 12;2017(2):hox008. doi: 10.1093/hropen/hox008. eCollection 2017.
Chesley LC, Cooper DW Genetics of hypertension in pregnancy: possible single gene control of pre-eclampsia and eclampsia in the descendants of eclamptic women. Br J Obstet Gynaecol. 1986 Sep;93(9):898-908. doi: 10.1111/j.1471-0528.1986.tb08006.x.
Gallo DM, Wright D, Casanova C, Campanero M, Nicolaides KH Competing risks model in screening for preeclampsia by maternal factors and biomarkers at 19-24 weeks' gestation. Am J Obstet Gynecol. 2016 May;214(5):619.e1-619.e17. doi: 10.1016/j.ajog.2015.11.016. Epub 2015 Nov 25.
Helmerhorst FM, Perquin DA, Donker D, Keirse MJ Perinatal outcome of singletons and twins after assisted conception: a systematic review of controlled studies. BMJ. 2004 Jan 31;328(7434):261. doi: 10.1136/bmj.37957.560278.EE. Epub 2004 Jan 23.
Jackson RA, Gibson KA, Wu YW, Croughan MS Perinatal outcomes in singletons following in vitro fertilization: a meta-analysis. Obstet Gynecol. 2004 Mar;103(3):551-63. doi: 10.1097/01.AOG.0000114989.84822.51.
Jacobsson B, Ladfors L, Milsom I Advanced maternal age and adverse perinatal outcome. Obstet Gynecol. 2004 Oct;104(4):727-33. doi: 10.1097/01.AOG.0000140682.63746.be.
Jeve YB, Potdar N, Opoku A, Khare M Donor oocyte conception and pregnancy complications: a systematic review and meta-analysis. BJOG. 2016 Aug;123(9):1471-80. doi: 10.1111/1471-0528.13910. Epub 2016 Feb 8.
Lean SC, Derricott H, Jones RL, Heazell AEP Advanced maternal age and adverse pregnancy outcomes: A systematic review and meta-analysis. PLoS One. 2017 Oct 17;12(10):e0186287. doi: 10.1371/journal.pone.0186287. eCollection 2017.
Llurba E, Crispi F, Verlohren S Update on the pathophysiological implications and clinical role of angiogenic factors in pregnancy. Fetal Diagn Ther. 2015;37(2):81-92. doi: 10.1159/000368605. Epub 2015 Feb 3.
Lucas-Carrasco R Reliability and validity of the Spanish version of the World Health Organization-Five Well-Being Index in elderly. Psychiatry Clin Neurosci. 2012 Oct;66(6):508-13. doi: 10.1111/j.1440-1819.2012.02387.x.
Pandey S, Shetty A, Hamilton M, Bhattacharya S, Maheshwari A Obstetric and perinatal outcomes in singleton pregnancies resulting from IVF/ICSI: a systematic review and meta-analysis. Hum Reprod Update. 2012 Sep-Oct;18(5):485-503. doi: 10.1093/humupd/dms018. Epub 2012 May 19.
Qin J, Liu X, Sheng X, Wang H, Gao S Assisted reproductive technology and the risk of pregnancy-related complications and adverse pregnancy outcomes in singleton pregnancies: a meta-analysis of cohort studies. Fertil Steril. 2016 Jan;105(1):73-85.e1-6. doi: 10.1016/j.fertnstert.2015.09.007. Epub 2015 Oct 9.
Qin JB, Sheng XQ, Wang H, Chen GC, Yang J, Yu H, Yang TB Worldwide prevalence of adverse pregnancy outcomes associated with in vitro fertilization/intracytoplasmic sperm injection among multiple births: a systematic review and meta-analysis based on cohort studies. Arch Gynecol Obstet. 2017 Mar;295(3):577-597. doi: 10.1007/s00404-017-4291-2. Epub 2017 Feb 6.
Reddy UM, Ko CW, Willinger M Maternal age and the risk of stillbirth throughout pregnancy in the United States. Am J Obstet Gynecol. 2006 Sep;195(3):764-70. doi: 10.1016/j.ajog.2006.06.019.
Roberts LM, Davis GK, Homer CS Pregnancy with gestational hypertension or preeclampsia: A qualitative exploration of women's experiences. Midwifery. 2017 Mar;46:17-23. doi: 10.1016/j.midw.2017.01.004. Epub 2017 Jan 10.
Skjaerven R, Vatten LJ, Wilcox AJ, Ronning T, Irgens LM, Lie RT Recurrence of pre-eclampsia across generations: exploring fetal and maternal genetic components in a population based cohort. BMJ. 2005 Oct 15;331(7521):877. doi: 10.1136/bmj.38555.462685.8F. Epub 2005 Sep 16.
Society for Maternal-Fetal Medicine (SMFM) Electronic address: pubs@smfm.org; Martins JG, Biggio JR, Abuhamad A. Society for Maternal-Fetal Medicine Consult Series #52: Diagnosis and management of fetal growth restriction: (Replaces Clinical Guideline Number 3, April 2012). Am J Obstet Gynecol. 2020 Oct;223(4):B2-B17. doi: 10.1016/j.ajog.2020.05.010. Epub 2020 May 12.
Thoma ME, McLain AC, Louis JF, King RB, Trumble AC, Sundaram R, Buck Louis GM Prevalence of infertility in the United States as estimated by the current duration approach and a traditional constructed approach. Fertil Steril. 2013 Apr;99(5):1324-1331.e1. doi: 10.1016/j.fertnstert.2012.11.037. Epub 2013 Jan 3.
Wen J, Jiang J, Ding C, Dai J, Liu Y, Xia Y, Liu J, Hu Z Birth defects in children conceived by in vitro fertilization and intracytoplasmic sperm injection: a meta-analysis. Fertil Steril. 2012 Jun;97(6):1331-7.e1-4. doi: 10.1016/j.fertnstert.2012.02.053. Epub 2012 Apr 3.
Williams PJ, Broughton Pipkin F The genetics of pre-eclampsia and other hypertensive disorders of pregnancy. Best Pract Res Clin Obstet Gynaecol. 2011 Aug;25(4):405-17. doi: 10.1016/j.bpobgyn.2011.02.007. Epub 2011 Mar 22.
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.