Conceiving a child while using fusion

[GodKaio-Ken]

Using DB and anime logic they would only be pregnant when fused and the pregnancy would only progress when fused.

Is that realistic? Nope. You throw realism out the door you start fusing people.

Are you saying that (in your opinion) the pregnancy will only progress until the unfuse or while fused including when they refuse so the fusion will always be pregnant until giving birth but not the two people fusing?

I'm saying its weird anime logic I could see happening...not so much I think its how it should work.

[omaro34]

What if Gotenks and Gogeta fused?

[Lionel]

What if Gotenks and Gogeta fused?

A hypothetical like that would hinge on the mechanics of fusion allowing for multi-layered mergings to take place. I don't see why Potara Earrings couldn't be used to fuse them together. Exclusive Metamorean based fusion may not be possible, though. Now if only they could use the Dragon Balls to maintain the permanency of the fusion.

[omegalucas]

If we take ONLY the manga into consideration, I'd guess as mentioned before with the Fusion Dance's time limit the "fetus" (quotation marks because in that timeframe it's still basically the egg) would be unviable because of the extra genetic material when the sperm defuses or itnever gets fertilized by a fused sperm (only a split one when it gets there, assuming they'd defuse like the main body). With the Potara it'd work as a regular "non-fused" pregnancy (like depicted in Multiverse), as the fused being is essentially a singular person (at most the offspring could be more powerful or have a strange voice effect )

If we take Super's Potara time limit of 1 hour into account, the result would be the same as with the Fusion Dance, I guess.

[TobyS]

"Fast-swimming sperm can reach the egg in a half an hour, while others may take days. The sperm can live up to 48-72 hours."

So the sperm might count as part of Gogeta/Gotenks and dissapear when they diffuse, or perhaps it diffuses into two sperm cells, one from each fusee.

If it's a woman fusee it's just a 30/minute hour old zygote getting aborted.

"It is estimated that as many as 75 percent of fertilized eggs do not go on to result in a full-term pregnancy."

so it isn't really any different from the likely outcome, it'd just be assumed they never got pregnant and a slightly heavier period would probably go unnoticed.

So nothing horrific like you all are speculating.

I can't believe this is a topic....

You've lost your mind. No sperm in the world could reach in an egg in as little as half an hour. Did you even take high school anatomy?

Speak for yourself bud, That's my personal record, I blow loads like a shotgun and my super-human sperm doesn't mess around.
But there's No need to be a rude asshole you can see I put quote marks on it because I copy pasted it.
Regardless the point is fusion only lasts half an hour, so the entire thing is a moot point. I believe the sperm/eggs of the fusee would vanish or split into 1 of each fusee. So I don't think there would ever be a true fusion-baby.

[Pantalones]

I figure the sperm, being part of the fused being's body, would revert to two separate ones after the fusion time was up... so you would have, say, both a Goku and a Vegeta sperm trying to fertilize the same egg if the fused sperm had already reached it by that point (somehow), which would either be non-viable or result in twins coming from different fathers if the fertilized egg splits in two before developing very far. Or you'd have the possibility of an egg being fertilized by one or the other only if they hadn't reached it yet by the time the sperm defused.

With a female fusion, it'd be the opposite situation -- the egg would defuse when the fusion time was up. Harder to say what the heck might happen to the sperm's genetic information if the egg had already been fertilized -- would both fusees end up with a normal pregnancy? Both with some weird "half of the guy's chromosomes fertilizing each egg, since the sperm was split between the two eggs when the fusion ended" probably-not-viable pregnancy? Would the fused egg be immediately counted as "another person" in some weird magical way and then divide into two and carry over to both of the fusees, so they'd end up with identical twins coming from two different mothers? The possibilities are SUPER weird and wide-ranging on the female-fusion side of things.

I blow loads like a shotgun

...so, right away as soon as someone pulls the trigger?