_____________________________________________________________________________________________________ *Corresponding author: E-mail: sundus.alnahi@gmail.com; Annual Research & Review in Biology 27(4): 1-10, 2018; Article no.ARRB.42475 ISSN: 2347-565X, NLM ID: 101632869 Effect of Age and Pre-ovulatory Estradiol2 Levels on Endometrial Thickness and Number of Dominant Follicles for Women with Polycystic Ovary Syndrome Subjected to Ovulation Induction Protocols Sundus Fadhil Hantoosh 1* , Farah T. O. Al-Jumaili 2 , Dheaa Shamikh Zageer 3 and Mayyahi Mohammad T. Jaber 3 1 Department of Training and Development, DNA Forensic Center for Research and Training, Al-Nahrain University, Baghdad, Iraq. 2 Department of Molecular and Medical Biotechnology, College of Biotechnology, Al-Nahrain University, Baghdad, Iraq. 3 DNA Forensic Center for Research and Training, Al-Nahrain University, Baghdad, Iraq. Authors’ contributions This work was carried out in collaboration between all authors. Author SFH designed the study, performed the statistical analysis, wrote the protocol and wrote the first draft of the manuscript. Authors FTOAJ and DSZ managed the analyses of the study. Author MMTJ managed the literature searches. All authors read and approved the final manuscript. Article Information DOI: 10.9734/ARRB/2018/42475 Editor(s): (1) Dr. Saramma George, Human Physiology, Department of Biomedical Sciences, Faulty of Medicine, University of Botswana, Botswana. (2) Dr. George Perry, Dean and Professor of Biology, University of Texas at San Antonio, USA. Reviewers: (1) Juliano Brum Scheffer, Brazilian Institute of Assisted Reproduction, Brazil. (2) Ivanova Liudmila, Kuban State Medical University, Russia. (3) Nirvana Samy, Egypt. Complete Peer review History: http://www.sciencedomain.org/review-history/25477 Received 31 st May 2018 Accepted 9 th July 2018 Published 11 th July 2018 ABSTRACT Introduction: Intrauterine insemination (IUI) is the first line of treatment in assisted reproductive technology. Oocyte quality and endometrial thickness are the main predictors of IUI pregnancy outcomes. Original Research Article