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.
My baby can no longer be referred to as a newborn. She is officially 3 months old and is now technically referred to as an infant. I remember when she was, in fact, a newborn that the thought of her becoming a 3 month old brought some comfort: if she ever were to get a fever, I wouldnât have to panic and rush her to an Emergency Room. She should be sleeping better.