Sentences with phrase «ejaculates from»

By using eggs and ejaculates from many individuals in each reproductive event, the authors provided realistic estimates of male reproductive fitness compared to the population.

In many species, the occurrence of female multiple mating (for internal fertilizers) or multi-individual spawning (for external fertilizers) leads to competition for fertilizations among ejaculates from rival males (sperm competition).

See full infographic: JPG PDF © CATHERINE DELPHIAFemales can also eject unwanted ejaculates from their reproductive tract.

Researchers at the University of Copenhagen, Denmark found that mixing ejaculates from different male ants in vitro increased the number of mobile sperm by 50 % compared to control samples which had been mixed with a saline solution.

Female promiscuity — something that occurs in a majority of species, including humans — results in the ejaculates from two or more males overlapping within her reproductive tract.

The ejaculate from this masturbation is stored in a pouch near the base of the tail and remains viable for more than a day.

Not exact matches

What's more, female ducks have anatomical blind alleys in their vaginas: Unwanted males that can't get very far in end up ejaculating into shallow pouches that keep sperm far away from any eggs.

Certain kinds of male fruit flies, for instance, use a cocktail of proteins in their ejaculate as a secret weapon to gain the edge; these proteins induce the female to increase her sperm uptake or her rate of egg - laying, or even to prevent her from considering any new suitors.

In the world's largest study to investigate how common lifestyle factors influence the size and shape of sperm (referred to as sperm morphology), a research team from the Universities of Sheffield and Manchester also found that sperm size and shape was worse in samples ejaculated in the summer months but was better in men who had abstained from sexual activity for more than six days.

In Atta leafcutter ants, the negative effect of the seminal fluid of other males was negated by secretion from the queen sperm - storage organ, suggesting that queens may control ejaculate competition after sperm storage.

Specifically, blind pockets and clockwise spirals in the vagina can physically block a penis, causing the sperm channel that runs along the outside of the male organ to ejaculate to the side, rather than at the tip, far away from where the female reproductive tract stores sperm for fertilization.

The researchers have witnessed firsthand how sperm from a mating with one male are displaced by a second male's ejaculate — and how some ejaculates resist displacement better than others.

Virtually no tubules examined (0.2 %) contained sperm from both males, supporting our hypothesis that sperm from different ejaculates are stored differentially across the SSTs of female birds.

However, a lot of men do complain about low energy and suffering from other symptoms of low testosterone if they ejaculate too often.

At the same time, as the above study suggests, abstaining from ejaculation for 7 days leads to a massive boost in testosterone on the 7th day; by ejaculating too frequently, you miss out on this testosterone boost.

Some, but not all, researchers say that the fluid produced by some women during orgasm («female ejaculate») comes from these glands.

There are girls who find it relatively easy to reach orgasm and even ejaculate and some other ones would be seeking a great help from your side in order to experience the ultimate pleasure in sex.

Duplicate ejaculates were obtained from 39 male Labrador retriever from Guide Dogs for the Blind (San Rafael, CA) breeding program.

But moving away from the ejaculate imagery, game hype is an interesting topic.

You can't pee and ejaculate at the same time — your body blocks pee from coming out when you're close to ejaculating.

It's also possible to get pregnant from other kinds of sexual activity — even if the penis doesn't ejaculate inside the vagina — but this is way less common.