1. Characteristics of the urinary luteinizing hormone surge in young ovulatory women 
Susanna J. Park, M.D., Laura T. Goldsmith, Ph.D., Joan H. Skurnick, Ph.D., Andrea Wojtczuk, M.S., Gerson Weiss, M.D. 
Fertility and Sterility 
Volume 88, Issue 3, Pages (September 2007)
DOI: /j.fertnstert
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Urinary excretion patterns in ovulatory women (n = 40). (A) Luteinizing hormone (LH). (B) Follicle-stimulating hormone (FSH). (C) Estrone conjugate (E1C). (D) Pregnanediol-3-glucuronide (PDG). Data are plotted wherein day 0 is the day of the LH peak. Three women were omitted because they missed one urine collection midcycle such that the peak of the LH surge could not be determined.
Park. Characteristics of urinary LH surge. Fertil Steril 2007.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Types of onset of the luteinizing hormone surge. For simplicity, the data of individual women representative of each pattern are depicted. (A) Rapid onset of 1-day duration. (B) Gradual onset of greater than 1-day duration.
Park. Characteristics of urinary LH surge. Fertil Steril 2007.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions

4. Figure 3
Types of luteinizing hormone surge configurations. For simplicity, the data of individual women representative of each pattern are depicted. (A) Spike. (B) Biphasic. (C) Plateau.
Park. Characteristics of urinary LH surge. Fertil Steril 2007.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions