I think about 2-3 days after a kitten is born. soo ya
No they hatch from eggs
no
Embryonic stem cells come from umbilical cords in small quantities, which are harvested by collecting cord blood.
Umbilical cords have two arteries and a vein inside them. These are surrounded by a material called Wharton's Jelly and a protective membrane known as the amnion.
No
They are placental mammals.
Two umbilical cords, two placentas, two bags of water, two of everything! That is unless they are conjoined twins.
Monkeys typically chew or tear their umbilical cords after giving birth. This behavior is instinctual and helps the mother monkey detach the newborn safely from the placenta.
Male adults doesn't have umbilical cords. They are cut off from the placenta when they are born.
If you would like to learn some more facts about umbilical cords a great place to check is the Brewer Diet. I highly recommend it as it has come in handy many times.
Mothers of quadruplets typically have four umbilical cords, one for each fetus. In a multiple pregnancy, each fetus usually develops its own placenta and umbilical cord, although in some cases, there may be shared placentas, particularly if the babies are identical. However, regardless of the placental arrangement, each baby is connected to the mother through its own umbilical cord.
No they let it hang free