title: The evolution of reference methods to monitor ovulation.
abstract: Reference methods to predict or detect ovulation have evolved substantially during the past few decades. The potential use and limitations of such methods are reviewed. The use of transvaginal ultrasonography with color flow mapping to monitor periovulatory changes in the intrafollicular morphology and blood flow is described.
authors.affiliation: Department of Obstetrics and Gynaecology, King's College School of Medicine and Dentistry, London. United Kingdom.
authors.forename: W P
authors.initials: WP
authors.lastname: Collins
mesh_terms: D015415:Biomarkers / Q000652:urine; D005260:Female; D006801:Humans; D006080:Ovarian Follicle / Q000098:blood supply / Q000000981:diagnostic imaging; D010060:Ovulation / Q000502:physiology; D010061:Ovulation Detection / Q000379:methods* / Q000639:trends; D012016:Reference Values; D012039:Regional Blood Flow; D013997:Time Factors; D014463:Ultrasonography
chemical_list: D015415:Biomarkers