Stages
MGUS stage
Monoclonal gammopathy of undetermined significance (MGUS), is defined as the presence in the blood or urine of a monoclonal antibody, antibody heavy chain, or antibody light chain in a person lacking symptoms or signs of a more serious plasma cell dyscrasia. The condition is typically discovered as an incidental finding when serum protein electrophoresis is done for various reasons unrelated to plasma cell dyscrasias. Protein electrophoresis generally detects one of the following patterns of monoclonal myeloma protein spikes representing: a) intact IgG, IgA, IgE, IgE, or IgM; b) intact IgG, IgA, IgE, IgD, or IgM plus high concentrations of a free (i.e. not bound to a heavy chain) κ or λ light chain; c) a free κ chain in great excess of a λ chain or a free λ chain in great excess of a κ chain; and d) free γ, δ, or μ heavy chains unbound to a light chain (free α and ε heavy chain myeloma protein spikes have not been reported). Among MGUS cases expressing an intact antibody, 70%, 15%, 12%, and 3% express either IgG, IgM, IgA, or two of these M proteins, respectively, with or without excessive levels of a light chain; these cases represent ~80% of all MGUS. About 20% of MGUS cases express either κ or λ light chains. As a group, these MGUS findings occur more commonly in men and are ~2-fold more common in individuals of African descent than Caucasians. MGUS cases expressing free γ, δ, or μ heavy chains are extremely rare.
Biological father –  or sometimes simply referred to as "Father" is the genetic father of a child. Posthumous father – father died before children were born (or even conceived in the case of artificial insemination). Putative father – unwed man whose legal relationship to a child has not been established but who is alleged to be or claims that he may be the biological father of a child. Sperm donor – an anonymous or known biological father who provides his sperm to be used in artificial insemination or in vitro fertilisation in order to father a child for a third party female. Also used as a slang term meaning "baby daddy". Surprise father – where the men did not know that there was a child until possibly years afterward
Teenage father/youthful father –  Father who is still a teenager. Non-biological (social and legal relationship)
Adoptive father – the father who has adopted a child
Cuckolded father – where the child is the product of the mothers adulterous relationship
DI Dad – social/legal father of children produced via Donor Insemination (where a donors sperm were used to impregnate the DI Dads spouse)
Father-in-law – the father of ones spouse
Foster father – child is raised by a man who is not the biological or adoptive father usually as part of a couple. Mothers partner – assumption that current partner fills father role
Mothers husband – under some jurisdictions (e.g.