Kisspeptin Protein in Seminal Plasma Is Positively Associated with Semen Quality: Results from the MARHCS Study in Chongqing, China

Figure 2

Associations of categorized kisspeptin in seminal plasma and categorized total kisspeptin with sperm concentration (a), total sperm number (b), and total motile sperm count (c). Kisspeptin levels were classified into four groups according to the quartiles (Q1 to Q4, from the lowest to the highest). We set the Q1 group as the reference level.

(a)

(b)

(c)