Intracytoplasmic sperm injection (ICSI) has increased the potential of the assisted reproductive technologies to propagate mammalian species and has provided an opportunity for research into cell cycle control and the mechanisms involved in sperm-induced oocyte activation. We have investigated the efficacy of ICSI in the rhesus monkey, the mechanism of fertilization following sperm injection an...

Sperm become most sensitive to cold shock when cooled from 37 °C to 5 °C at rates that are too fast or too slow; cold shock increases the susceptibility to oxidative damage owing to its influence on reactive oxygen species (ROS) production, which are significant stress factors generated during cooling and low temperature storage. In addition, ROS may be a main cause of decreased motility and fe...

One-hundred and twenty-three ewes were used in three experiments designed to determine whether the regulation of estrus, by administration of either prostaglandin F2 a (PG) to regress corpora lutea or medroxyprogesterone acetate (MAP) to control the length of the estrous cycle, would increase sperm death in the reproductive tract at the ensuing estrus. Ewes were treated either with PG injected ...

OBJECTIVE To investigate the effects of the psychotropic compounds Delta(9)-tetrahydrocannabinol (Delta(9)-THC) and Delta(8)-tetrahydrocannabinol (Delta(8)-THC) on sperm mitochondrial O(2) consumption (respiration). SETTING State University of New York Upstate Medical University, Syracuse, New York. PATIENT(S) Forty-one men who visited the andrology laboratory for fertility evaluation. IN...

OBJECTIVE To determine the effect of 4-hydroperoxycyclophosphamide (4OOH-CP) on the respiration of human sperm, and investigate the protective properties of mesna and WR-1065. SETTING SUNY Upstate Medical University, Syracuse, NY. PATIENT(S) Men (n = 12) visited the Andrology Department for fertility evaluation. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) Sperm respiration. RESULT(S...

Reactive oxygen species (ROS) levels in semen are believed to play both physiological and pathological roles in male fertility. The study was aimed to find the clinical significance of ROS levels in infertile Indian men. This pilot study included 33 idiopathic infertile men and 18 proven fertile controls. ROS levels in the washed sperm were measured using chemiluminescence assay and expressed a...

Backgroud: Intrauterine insemination (IUI) is generally attempted before proceeding to more expensive and invasive assisted reproductive techniques such as invitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI). This procedure is most commonly performed as a therapeutic method for couples with a wide variety of subfertility etiologies, such as low count or low motility of sperm...

BACKGROUND ICSI is a relatively new treatment for human male-related infertility, as well as an efficient method for the production of transgenic animals by injecting into the oocyte sperm previously incubated with foreign DNA. As semen samples collected in human infertility clinics are frequently contaminated with bacteria, one risk associated with the ICSI procedure is the injection of foreig...