A Mrs. Kristy L. France, Cardiology (Cardiovascular Disease), answered on behalf of Honor Society of Nursing (STTI). The blood type of a child depends on the blood type of the parents. Each parent/person has two genes that make up the blood type. Depending on which combination each parent has determines the different combinations that the child can have.
The use of bands and chains are mentioned on the Powerlift Assistance Exercises pages. This page will describe their use. The use of bands and chains are especially recommended for those who compete using squat and deadlifts suits and a bench shirt. The bands and chains mimic the effects that the gear gives and provide extra work for the top part of each lift.
Other factors to consider are: will there be a pendent and how often the chain will be used. If the chain will be used with a pendent then the size of the pendent should be taken in to consideration while choosing the chain. You want a chain which is appropriate for the pendent size and weight. This will ensure the chain will not break due to the weight of the pendent. The use of the chain is equally important. If the use of the chain will be continuous then your primary concern should be strength and then the aesthetics of the chain.