Effects of ejaculation by masturbation in vitro on serum prolactin secretion

Abstract

Objective To investigate the effects of ejaculation by masturbation in vitro on serum reproductive hormone release and to evaluate the relationship between prolactin raising and orgasm satisfaction.Methods One hundred and seventy-two men were divided into two groups according to the time of collecting the blood before or after ejaculation.The after ejaculation group was further divided into two subgroups according to the orgasm satisfaction.Serum reproductive hormone levels were then assessed in different groups.Results Serum prolactin level was significant higher in the after ejaculation group (0.55 ± 0.18)nmol/L than in the before ejaculation group [(0.35 ± 0.17) nmol/L,P ＜ 0.05].Prolactin level was significant lower in insufficient orgasm men (0.43 ± 0.13) nmol/L than in orgasm satisfied men [(0.57 ±0.18) nmol/L,P ＜ 0.05].The other reproductive hormone (testosterone,estradiol,follicle stimulating hormone and luteinizing hormone) showed no significant difference in different groups.Conclusions Serum prolactin level is increased after ejaculation and maybe related to the orgasm satisfaction status.Elevated serum prolactin level perhaps could be used as a marker in assessing the semen collection by masturbation. Key words: Ejaculation; Masturbation; Prolactin; Reproductive hormone; Orgasm