Seminal fluid is often assumed to have just one function in mammalian reproduction,
delivering sperm to fertilize oocytes. But seminal fluid also transmits signaling agents that …

Sperm storage, the extended maintenance of viable sperm, probably occurs in most
internally fertilizing animals. Because it temporally separates mating from conception, sperm …

Evolutionary biologists have endeavoured to explain the extraordinary diversity of sperm
morphology across animals for more than a century. One hypothesis to explain sperm …

The capacity for sperm storage within the female reproductive tract occurs widely across all
groups of vertebrate species and is exceptionally well developed in some reptiles (maximum …

The fallopian tube, or oviduct, is no longer considered merely a conduit that joins the uterine
horns and the ovaries, being recognised as a venue for the capacitation of spermatozoa and …

The ability to store sperm in the female genital tract is frequently observed in vertebrates as
well as in invertebrates. Because of the presence of a system that maintains the ejaculated …

Reproduction is quintessential to species survival. But what is underappreciated for this
discipline is the wondrous array of reproductive mechanisms among species—variations as …

Considerable variation is inherent both within and between comparative physiological data
sets. Known sources for such variation include diet, gender, time of day and season of …

Facultative parthenogenesis (FP) has historically been regarded as rare in vertebrates, but
in recent years incidences have been reported in a growing list of fish, reptile, and bird …

Using basic ecological concepts, we introduce sperm ecology as a framework to study
sperm cells. First, we describe environmental effects on sperm and conclude that …