What drives the partners of men who have died to try and have their babies? Jenny Morber delves into the legally and ethically fraught world of post-mortem sperm donation. It is late evening, just over an hour after the doctor first groped for his ringing phone.
Seminal plasma proteins bound to the sperm plasma membrane modified the functional characteristics of damaged spermatozoa, reproducing those of live cells. Scanning electron microscopy showed that the dramatic structural damage induced by cooling reverted after incubation with seminal plasma proteins. Assessment of membrane integrity by fluorescence markers also indicated a restoration of intact-membrane cells.
Electroejaculation is a procedure used to obtain semen samples from sexually mature male mammals. The procedure is used for breeding programs and research purposes in various species, as well as in the treatment of an ejaculatory dysfunction in human males. In humans, electroejaculation is usually carried out under a general anesthetic.
According to a study published in Archives of Sexual Behaviorpeople in the United States seem to be having more anal sex today than they did in the past. In addition, the researchers learned that many women find anal sex enjoyable, while others find it painful or unpleasant and only agree to it due to some other factor. Common factors include feeling pressured by a sexual partner and wanting to avoid pregnancy, among others.
Gross motility is examined first. Mix the semen sample with a wooden stick, as motile sperm cells will try to swim upward and dead cells will settle to the bottom. For gross motility use 2 wooden sticks to place a drop of semen on a warm slide.
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We investigated the identity and quantitative variations of proteins extracted from human sperm heads using a label-free Gel-MS approach. Sperm samples were obtained from three men with high sperm counts at three different time points. This design allowed us to analyse intra-individual and inter-individual variations of the human sperm head proteome. Each time point was analyzed in triplicate to minimize any background artifactual effects of the methodology on the variation analyses.
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