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Sperm storage organs in the fruit fly Drosophila melanogaster.Female was first mated with GFP-male and then re-mated with RFP-male. Female sperm storage is a biological process and often a type of sexual selection in which sperm cells transferred to a female during mating are temporarily retained within a specific part of the reproductive tract before the oocyte, or egg, is fertilized.
A professional diver captured a rare video at the beginning of June of a group of sperm whales 'cuddling'. Kayleigh was having a lucky day using a drone for the first time when she noticed the ...
Bateman attributed the origin of the unequal investment to the differences in the production of gametes: sperm are cheaper than eggs. A single male can easily fertilize all of a female's eggs; she will not produce more offspring by mating with more than one male. A male is capable of fathering more offspring if he mates with several females.
The spermatheca (pronounced / s p ər m ə ˈ θ iː k ə / pl.: spermathecae / s p ər m ə ˈ θ iː s iː /), also called receptaculum seminis (pl.: receptacula seminis), is an organ of the female reproductive tract in insects, e.g. ants, bees, [1] some molluscs, Oligochaeta worms and certain other invertebrates and vertebrates. [2]
It contains sperm and important nutrients for the female, [28] and ensures that the male is the only one to fertilize the female's eggs. [ 27 ] Most species of stingless bees , like Plebeia remota , are only mated once, and thus make use of mating plugs to store all the sperm they collect for future use.
Thus, a female's cells will remain in the male's testicles long enough to be converted into sperm. However, there are more serious challenges. Biologists have well established that male sperm production relies on certain genes on the Y chromosome, which, when missing or defective, lead to such males producing little to no sperm in their ...
There are many misconceptions about orgasms, and more than one of them have to do with squirting. For one thing, there’s the myth that every single climax ends in a literal stream of erotic bliss.
Dog sperm collection. In order to collect semen from a male dog, an artificial vagina is prepared, [15] [16] which is a conical thin latex sleeve ending in a sterile collection tube. The inside of the latex sleeve is lightly lubricated. [17] The male is allowed to sniff a female in estrus. Experienced studs cooperate readily in the process.