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They did not carry their eggs. Dinosaurs kept their eggs in nests just like modern birds and reptiles.
Ladybirds (ladybugs) lay eggs, they don't carry their young.
A fertility specialist can help you with this. There are other factors to consider, other than how many ovaries you have. For example, how viable are your eggs? Genetics, age, overall health, hormonal balance, and other factors can impact ovum health and viability. By saying "you want someone else to carry your egg", I'm assuming you mean you wish to have someone else carry your child. Implantation of egg alone is not really an option. You would have to see a fertility specialist with your partner in order to have your eggs artificially fertilized with your partners sperm (presumably), then frozen.
The mother seahorses that tried to carry the eggs were not competitive with the mother seahorses who deposited their eggs in the brood pouches of the male seahorses. The genes of the ones who had more offspring survived.
Raccoons
It needs to be incubated (or sat on until able to hatch) for approximately 27 to 30 days.
It would have more eggs
No, ladybugs do not sit on their eggs. The ladybug lays her eggs in a place that is safe from prey and close to a food source for the babies.
They carry them around in pockets on their underbellies until the eggs mature.Then, when the baby lobsters are capable of surviving on their own, the lobster shakes them free. Shrimps do this as well.
How long do bass carry eggs
It would be possible, though it may be hard to achieve. The entire process would need to be done using IVF. Not all eggs that are implanted take, therefore, it is possible that both eggs may not take at the same time.
Birds lay eggs, they do not have a baby. A bird may lay eggs and sit on them but unless there is a male with her, they are not fertilized and will not hatch.