Testosterone is the main male sex hormone and is essential for the maintenance of male
secondary sexual characteristics and fertility. Androgen deficiency in young men owing to …

Despite significant advances in contraceptive options for women over the last 50 yr, world
population continues to grow rapidly. Scientists and activists alike point to the devastating …

Context: Hormonal male contraceptive regimens effectively and reversibly suppress sperm
production, but there are few large-scale efficacy studies. Objective: The safety …

Background Hormonal methods for safe, reliable, and reversible contraception based on the
suppression of spermatogenesis could soon become available. We have investigated the …

Context: Male hormonal contraceptive methods require effective suppression of sperm
output. Objective: The objective of the study was to define the covariables that influence the …

Despite increases in female contraceptive options, 40–45% of pregnancies across the world
are still unplanned. While several effective female contraceptive methods have been …

Research has established the principle of hormonal male contraception based on
suppression of gonadotropins and spermatogenesis. All hormonal male contraceptives use …

The goal of this study was to find the most favorable injection interval of norethisterone
enanthate (NETE) plus testosterone undecanoate (TU) in terms of gonadotropin, sperm …

Testosterone is one essential endocrine factor for gametogenesis in male mammals. The
other hormone associated with spermatogenesis is follicle-stimulating hormone (FSH). A …

World population continues to grow at an unprecedented rate, doubling in a mere 50 years
to surpass the 7-billion milestone in 2011. This steep population growth exerts enormous …