<unk>  may be either traditional or gestational, which are differentiated by the genetic origin of the egg. Gestational<unk>  tends to be more common than traditional<unk>  and is considered less legally complex. Traditional<unk>  A traditional<unk>  (also known as partial, natural, or straight<unk>  is one where the surrogate's egg is fertilised by the intended father's or a donor's sperm. Insemination of the surrogate can be either through sex (natural insemination) or artificial insemination. Using the sperm of a donor results in a child who is not genetically related to the intended parent(s). If the intended father's sperm is used in the insemination, the resulting child is genetically related to both the intended father and the surrogate. In some cases, insemination may be performed privately by the parties without the intervention of a doctor or physician. In some jurisdictions, the intended parents using donor sperm need to go through an adoption process to have legal parental rights of the resulting child. Many fertility centres that provide for<unk>  assist the parties through the legal process. Gestational<unk>  Gestational<unk>  (also known as host or full<unk>  was first achieved in April 1986. It takes place when an embryo created by in vitro fertilization (IVF) technology is implanted in a surrogate, sometimes called a gestational carrier. Gestational<unk>  has several forms, and in each form, the resulting child is genetically unrelated to the surrogate: * The embryo is created using the intended father's sperm and the intended mother's eggs; * The embryo is created using the intended father's sperm and a donor egg; * The embryo is created using the intended mother's egg and donor sperm; * A donor embryo is transferred to a surrogate. Such an embryo may be available when others undergoing IVF have embryos left over, which they donate to others. The resulting child is genetically unrelated to the intended parent(s).
Surrogacy
Neglect
Metopism
Thrifty phenotype
Henogamy
Undervirilization
Hypermobility 
Dichromacy