Is There an Association Between Circulating Kisspeptin Levels and Ovarian Reserve in Women of Reproductive Age?

Background/Aim: To investigate the possible association of kisspeptin levels with the ovarian reserves of women of reproductive age. Patients and Methods: Eighty women aged 19-40 participated after signing an informed consent. Of these, 74 were finally included as in 6 women the blood samples were considered inappropriate due to hemolysis. They were divided into three main groups according to their ovarian reserve patterns: women with adequate ovarian reserves (Group A -AOR) (n=30), women with increased ovarian reserves (Group B -PCOS) (n=31), and women with diminished ovarian reserves (Group C -DOR) (n=13). Results: Women with diminished ovarian reserves had statistically significantly increased age and FSH compared to the other two groups. No statistically significant difference was found between the three groups for estradiol and thyroid stimulating hormone. Moreover, body mass index, luteinizing hormone, total testosterone, 17-hydroxyprogesterone, dehydroepiandrosterone, anti-Mullerian hormone (AMH), and antral follicle count (AFC) were increased in group B compared to the other two groups. AMH and AFC were decreased in women with diminished ovarian reserves compared to the other two groups, as expected. The comparison of kisspeptin levels between the three groups showed that kisspeptin levels were increased in women with diminished ovarian reserves, compared to the other two groups, but without a statistically significant difference. However, kisspeptin levels in group C were statistically significantly higher than those in group A. Conclusion: There are no strong indications that kisspeptin levels are associated with the ovarian reserve in women of reproductive age.