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.
To start, the baby isn't considered a fetus until 2 months. For the first month it is a zygote. There is no straight answer to this question. During the 6th week, the heart begins to beat so you could consider this a milestone to mark the transition into it becoming a baby.t is all relative to the individual. Some believe conception, others not until the baby takes it's first breath. If you look at state laws, that is their definition that a baby isn't a baby but a fetus until it draws its first breath.