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In nature, the female animal usually lays eggs. However there are a few exceptions to this rule. Three animals; seahorses, pipefish, and leafy sea dragons, naturally give birth to offspring. There are also cases of unnatural male pregnancies that are caused by chemicals in waterways.
First, we will start with the natural instances of male birth. The male seahorse is known for giving birth to its babies, but why is this? The answer is that the female seahorse actually gives her eggs to the male seahorse. When trying to reproduce, the female seahorse dumps off all of her unfertilized eggs into the male's brooding pouch. Once the eggs are inside of the male's pouch, the male begins to fertilize the eggs with his own sperm. The male then holds onto the offspring until they are ready to be born. Pipefish reproduce in the exact same way as their close relative, the seahorse. Pipefish have a brooding pouch that holds the females eggs while the male pipefish fertilizes them. The seadragons reproduce much like the pipefish and seahorses as well, yet instead of having a pouch on its stomach like the others, the leafy sea dragon has individual pouches on its tail.
Second, we will discuss how certain male animals can become pregnant unnaturally. In a scientific study, 40 male African clawed frogs were grown from infancy to adulthood in a solution that contained the chemical Atrazine, which is a common ingredient in weed killer. When observed, 10% of the frogs developed into females. These animals grew ovaries and were technically females even though two of the four frogs were males according to there DNA.
In nature most females give birth to their young, yet in these few instances the reproduction process is different in such a way that the male is the one to give birth to its young.
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Why are some animals born in eggs?
SOme animals are born in eggs usually for protection. It is because if they were born without eggs, they would not be able to survive. SOmetimes it is because they hatch under water or in the sand.
Can a female lay eggs by herself?
Yes. females in a lot of animals will lay eggs regardless if they are fertilized or not and regardless if a male is even present. This is true in birds, some reptiles and fish.
Do fish hatched from egg?
All fish come from eggs. Some fish lay eggs and male fertilize them some fish are like humans and animals the egg developes inside the fish and live birth happens.
Do king crab lay eggs?
No males of any kind produce eggs. "Egg" is the name of the female sex cell (gamete). Some male animals will help care for eggs so that they will hatch and be healthy, but no males make or lay eggs.
Why do some animals make few eggs when other make loads?
Due to evolution, some animals need to make more eggs if there is a higher chance of predators taking some of the eggs.
What happens if no fertilization occur?
In plants - no seeds, no fruit. In most animals - no baby. In some insects - male offspring. When these insects' eggs ARE fertilized you get female offspring!
Why do some toads do not contain eggs?
They are male toads.
Why do some animals not need a placenta?
Not all animals have placentas because they lay eggs instead. Only mammals have placentas by the way. Other animals use eggs and amniotic eggs.
What animals that are hatched from eggs?
It depends on the species of animal. In general, females will lay eggs. However there are some species of animals where the male lays the eggs. Seahorses, for example, rather than the male impregnating the female, the female actually impregnates the male(!), who later lays the eggs.
Do male eggs lay eggs?
For the most part, No. Some reptiles are parthenognic that is they can have young of lay eggs and be gender neutral.
Do animals hump?
yes they do. some can have eggs or none
How are ants created?
they are not made the are born and they have a head thorax and abdomen
