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The Twisted World of Sexual Organs




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Testes with ambiguous genitalia. This may be caused by a condition called 5-alpha-reductase deficiency. The enzyme 5-alpha reductase sed deficient; therefore, it orgsn carry out its task of converting testosterone into dihydrotestosterone Ortanwhich is dex for complete masculinization of a male fetus. Normal female internal structures uterus, ovaries, fallopian tubes but virilized external genitalia. The most common cause is congenital adrenal rogan CAH. CAH is most commonly caused by a oran in an enzyme hydroxylase in the steroid hormone synthesis pathway in the adrenal gland.

CAH the most common cause of atypical genitalia in newborns, present in about one in 15, newborns. CAH is very serious and is often associated with electrolyte such as sodium imbalances. This can occur if hormones enter the placenta via the mother, such as when the mother receives progesterone to prevent a miscarriage or has a hormone-producing tumor. There are a number of causes of female pseudohermaphroditism: Congenital adrenal hyperplasia CAH: Congenital adrenal hyperplasia CAH Girl babies with this condition have male sex organs.

The condition is caused by a lack of a certain enzyme in the adrenal gland. It is the most common cause of atypical genitalia in newborns. The condition is inherited and passed on by an autosomal recessive gene. Autosomal recessive means that each parent carries one copy of the gene and passes on the gene to the child. Carrier parents have a 1 in 4 chance of having a child with this condition with each pregnancy. Girl babies with the condition have atypical genitalia. Boy babies do not. In some cases, the mother of a child with this condition can be given medicines during pregnancy to lessen the effects of the enzyme deficiency if the fetus is female. Another type of CAH is called "salt-losing.

Severely sexx child is important, the parents are available with men that are often ruined to end, such as whether or not to hook the genitalia, assign the denial as ways or civilor political the hardcore as is. Loss procedures may differ a very screening test for CAH, lady principles, and a review of the regional organs.

Girls - the internal genital parts transform into the uterus, fallopian tubes and vagina. The gonads turn into ovaries which start producing female sex hormones. The lack of male hormones is fundamental in allowing the development of female genitalia. Boys - the internal genital parts transform into the prostate gland and vas deferens. The gonads turn into testes which start producing male sex hormones. The presence of male hormones allows the penis and scrotum to develop. Types of ambiguous genitalia The different types of ambiguous genitalia include: The baby has ovaries and testicles, and the external genitals are neither clearly male nor female.

The baby has ovaries and a penis-like structure or phallus.

sexx The baby has undescended testes and external female genitals including a otgan. Causes of ambiguous genitalia For typical genital development, the oran 'message' must be communicated from the sex chromosomes to the gonads. One idea is that women, like some other mammals, use muscular contractions to retain more sperm after particularly satisfying sex sexx, but Miller thinks it may be simpler than that. Throughout human evolutionary history, N may just have ses to have sex more times with the men best able to provide sexual pleasure, making it more likely that these men would father their children and pass on their genes for larger penises - particularly since humans must often have sex several times to guarantee a pregnancy.

These latest revelations from the annals of sex research have convinced many biologists that genitalia have taken on their current shape and size to make the sexual act a more stimulating experience for the female of the species. But probably no less convincing is the evidence that in some situations the battle between the sexes that has been the guiding hand. Perhaps the ultimate truth is that the world of sexual organs is such a strange place because of a schizophrenic combination of both: A coloured scanning electron micrograph of a penis from a drone honeybee Apis mellifera.

During mating, a male will mount a virgin queen in the air, insert his penis and ejaculate semen. After mating, the male falls off the female leaving his penis behind. He will eventually die. Other males will continue to mate with the queen, removing the previous male's penis in the process. During mating, the male damselfly uses abdominal claspers to grab the female by the neck. The female then curves her body round until the tip of her abdomen touches his genital opening and collects the sperm. The male penis has two hook-like extensions that are lined with fine hairs.

These hooks are able to remove a previous mate's sperm contained within the female's sperm storage organs. During mating, the male pierces the body wall of one of the female's abdominal segments with this organ and deposits his sperm in a sac. The sperm then migrate through the body cavity, where they are stored ready for later fertilisation. Among the insects, this so-called traumatic insemination is unique to bedbugs and related families.

Sex organ No

The male's penis yellow, centre right has a tip covered in hard spines, which unfold during copulation. These penetrate the lining of the female's genital tract, leaving puncture wounds. Mating is costly for the female left ; if she copulates with more than one male, she incurs extensive damage and so dies early. The penis is normally concealed as a coil within the abdomen of the flea. During mating, the male attaches himself to the female with his antennae and genital claspers. The male is then able to uncoil his penis and penetrate the female. Mating can last from one to nine hours. The sex comb is found only on the front legs of males and is one of the most rapidly evolving male-specific traits in Drosophila.

They use them to grasp the females' abdomen and genitalia and to spread their wings prior to copulation. But someone who has neither. Check out the term, "neutrois", particularly this site, http: The site itself is old - it was originally on neutrois. The term's a neologism, and nearly all places that use the term go back to that one site, which is where it was coined.


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