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Fertil Steril. 1997 Aug;68(2):334-9.

Effect of increased scrotal temperature on sperm production in normal men.

Author information

1
Department of Medicine, Harbor-University of California, Los Angeles Medical Center, Torrance 90509-2910, USA. WANG@HARBOR6.HUMC.EDU

Abstract

OBJECTIVE:

To determine whether application of polyester-lined athletic supports to bring the testes closer to the abdomen increases scrotal temperature and decreases sperm production.

DESIGN:

Prospective clinical study.

SETTING:

University academic medical center.

PATIENT(S):

Twenty-one healthy male volunteers.

INTERVENTION(S):

The study consisted of a pretreatment period of 6 weeks, a treatment phase of 52 weeks, and a recovery phase until return to normal sperm production. During the treatment phase, the men wore polyester-lined athletic supports (single layer, double layer, or double layer impregnated with aluminum) throughout the day.

MAIN OUTCOME MEASURE(S):

Semen parameters and sperm function tests.

RESULT(S):

In all three groups of subjects, scrotal temperature was consistently increased by 0.8 to 1 degree C while the subjects were wearing the athletic supports. Mean sperm concentration; sperm motility, morphology, and viability; sperm hyperactivation; and ability of spermatozoa to penetrate zone-free hamster oocytes were not affected by the increase in scrotal temperature.

CONCLUSION(S):

The increase in scrotal temperature induced by polyester-lined athletic supports was insufficient to cause significant suppression of spermatogenesis or alteration of sperm function.

PMID:
9240266
DOI:
10.1016/s0015-0282(97)81525-7
[Indexed for MEDLINE]

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