Hermaphroditic animals—mostly invertebrates such as worms , bryozoans moss animals , trematodes flukes , snails , slugs , and barnacles —are usually parasitic, slow-moving, or permanently attached to another animal or plant. After exchange of spermatozoa , both animals will lay fertilized eggs after a period of gestation; then the eggs will proceed to hatch after a development period. Treatment of intersex in humans depends upon the age at which the diagnosis is made. Reproductive system of gastropods:
Treatment of intersex in humans depends upon the age at which the diagnosis is made. Ghiselin  which states that if an individual of a certain sex could significantly increase its reproductive success after reaching a certain size, it would be to their advantage to switch to that sex. However, they develop breasts during puberty and menstruate and in only rare cases actually produce sperm. Sequential hermaphroditism is common in fish particularly teleost fish and many gastropods such as the common slipper shell , and some flowering plants.
Initial phase males do not look like males and spawn in groups with other females. Other kinds of intersex conditions are identified immediately at birth because those with the condition have a sexual organ larger than a clitoris and smaller than a penis.
Wrasses also have an uncommon life history strategy, which is termed diandry literally, two males. The species of colourful sea slugs Goniobranchus reticulatus is hermaphroditic, with both male and female organs active at the same time during copulation. In 46,XX intersex female pseudohermaphroditism , individuals have male external genitalia but the chromosomal constitution and reproductive organs of a female. If the female is removed, the reproductive male will change sex and the largest of the non-reproductive males will mature and become reproductive.
Although they possess ovaries and testes, they have a protective mechanism against self-fertilization. Thus, patient consent has become an increasingly important part of decisions about intersex surgery, such that surgery may be delayed until adolescence or adulthood, after patients have had sufficient time to consider their gender and are able to make informed decisions about treatment. Sequential hermaphrodites can only change sex once. In older individuals the accepted gender may be reinforced by the appropriate surgical procedures and by hormonal therapy.
Later in life, for example, the person may not be satisfied with the results of surgery and may not identify with the assigned gender. In humans, conditions that involve discrepancies between external genitalia and internal reproductive organs are described by the term intersex. Earthworms are simultaneous hermaphrodites, having both male and female reproductive organs.
Posted by: Kazibar | on October 2, 2012
Learn More in these related Britannica articles: Sequential hermaphroditism is common in fish particularly teleost fish and many gastropods such as the common slipper shell , and some flowering plants.
Each has two penises on the undersides of their heads which they use to inject sperm. Wrasses also have an uncommon life history strategy, which is termed diandry literally, two males.
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