Leukocytes are not limited to blood. They occur elsewhere in the body as well, most notably in the spleen, liver, and lymph glands. Most are produced in our bone marrow from the same kind of stem cells that produce red blood cells. Others are produced in the thymus gland, which is at the base of the neck.
Once your baby is past 3 months than that is no longer a newborn. But that isn't considered a toddler either yet. They are a baby up until they start to walk then they are called a toddler. Source(s): My opinion. chicken2008 Â· 6 years ago. Thumbs up. 0. Thumbs down. 0. Comment.
The earlier a baby is born before this the more dangerous it is. Most babies born after 28 weeks will be ok but before that it gets a more problematical. The youngest baby EVER to survive was around 22 weeks and 6 days, but I don't know how healthy she is. The other variable is the health of the mother and baby before the birth. My Daughter had twin boys at 25 weeks, They were 1 lb 9oz and 1 lb 5oz. They were in the nicu for 3 months.