Though others may have found this question hard to swallow (ba-dum-tcchh!), having the strength to be open about this is admirable. Finding yourself with a case of the runs can certainly put a damper on your whole sexual experience. While a semen allergy is one possible cause of dicey bowels, such allergies are quite rare. Perhaps you?ll be relieved to hear that it?s more likely that your diarr...

Though others may have found this question hard to swallow (ba-dum-tcchh!), having the strength to be open about this is admirable. Finding yourself with a case of the runs can certainly put a damper on your whole sexual experience. While a semen allergy is one possible cause of dicey bowels, such allergies are quite rare. Perhaps you?ll be relieved to hear that it?s more likely that your diarr...

Ejaculates (n=344) were collected from 35 Polish Landrace boars. The ejaculates were assigned to one of four groups according to the total number of spermatozoa in an ejaculate. Morphometrical measurements of spermatozoa with proper morphology were performed. Spermatozoa with smaller head length and head area were found in ejaculates with the greatest total sperm number (more than 120 x 10(9) s...

The reproductive characteristics and seminal carnitine and acetylcarnitine content as well as carnitine acetyltransferase activity of young Maremmano stallions (n=25) are reported. The stallions were subjected to semen collection in November and January; in each trial two ejaculates were collected 1h apart. The total motile morphologically normal spermatozoa (TMMNS) and the progressively motile...

Prostaglandin F2α (PGF2α), oxytocin and gonadotropin releasing hormone (GnRH) have been used in bulls, rams, boars, stallions or rodents to increase sperm numbers in the ejaculate. Improving sperm quantity in the canine ejaculate would benefit all assisted reproductive techniques used in this species. The purpose of the present study was to evaluate the effects of PGF2α, oxytocin and GnRH on ca...

Reproductive behaviors have evolved through severe inter-sexual competition. We have recently described a behavior in post-mated female Drosophila melanogaster that controls ejaculate retention and sperm storage, and is a possible mechanism by which females who have mated with several partners can choose which sperm that is stored and used for fertilization. This behavior can also regulate expo...