Let's say you enjoy swimming. One day you decide to swim alone. But it's a risky idea because you could drown and no one would be there to help you in time. So it's best to have others around incase you have an accident or need help.
Superfetation is when a second child is conceived during pregnancy. This cause the <span>embryos to rise and it gives each a different age while still in the uterus. It's basically like when to twins are conceived, just at different times.
- Marlon Nunez</span>
