Extra Parent Conception: Difference between revisions

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A child is conceived, but instead of simply mixing one male sperm and one female ovum, a third set of genes becomes involved.

Most often used in a [[Free-Love Future]] or as a result of [[Bizarre Alien Biology]], a child turns out to be the [[Mix-and-Match Man|genetic offspring of multiple people]] ~~-- except~~, it was ''natural conception''.

Most often used in a [[Free-Love Future]] or as a result of [[Bizarre Alien Biology]], a child turns out to be the [[Mix-and-Match Man|genetic offspring of multiple people]]—except, it was ''natural conception''.

Perhaps we're dealing with [[Boldly Coming|aliens]] or [[Divine Parentage|supernatural beings]] and it's normal for them to conceive children this way. Or maybe, this was just some freak occurrence which took ''everybody'' by surprise. However it went down, [[Coitus Ensues|Mass-Coitus Ensued]] and a baby happened.

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== [[Live Action TV]] ==

* The Newcomers in ''[[Alien Nation (TV series)|Alien Nation]]''. Tenctonese have three ~~sexes -- male~~, female, and ~~binnaum -- all~~ three of which are necessary to have a child. Because binnaums are relatively rare, they traditionally live monastic lives, only having sex when they are asked to help fertilize an egg for a male/female couple.

* The Newcomers in ''[[Alien Nation (TV series)|Alien Nation]]''. Tenctonese have three sexes—male, female, and binnaum—all three of which are necessary to have a child. Because binnaums are relatively rare, they traditionally live monastic lives, only having sex when they are asked to help fertilize an egg for a male/female couple.

** One episode dealt with changing social roles as the Newcomers adapted to life on Earth. A binnaum has married a female and seeks the help of "his" male friend in reproducing (IIRC the binnaum was the one to help the male and his wife produce their own children years ago). The male is at first uncomfortable with this non-traditional situation (the male being an absent parent while the binnaum will raise the child), but eventually agrees.

* In ''[[Earth: Final Conflict]]'' Liam Kincaid is the result of three biological parents: two human parents and one alien. Agent Sandoval, Agent Beckett and Ha'Gel, who was possessing Sandoval.

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== [[Real Life]] ==

* Polyspermy, in which two sperm penetrate a single egg simultaneously, ''can'' happen, even in humans. It's just incredibly rare, due to the egg's sperm-excluding cortical reaction, and the resulting triploid zygote cannot develop any further. Thus, a human [[Extra Parent Conception]] is theoretically possible, but a natural Extra Parent ''Birth'' is not.

* Polyspermy, in which two sperm penetrate a single egg simultaneously, ''can'' happen, even in humans. It's just incredibly rare, due to the egg's sperm-excluding cortical reaction, and the resulting triploid zygote cannot develop any further. Thus, a human Extra Parent Conception is theoretically possible, but a natural Extra Parent ''Birth'' is not.

* There is an in-vitro fertilization technique where the nucleus of one egg is inserted into a different donor's egg, then fertilized and implanted. The Mitochondrial DNA of the donor egg would be from a third person.