How does hair growth change with blood group?

Abstract

Blood group is actually classification of blood types that is based on presence of absence of antigens or antibodies. Humans have 4 major blood groups. For example A blood group, B blood group, AB blood group and O blood group. Parents transfer the genes to their children which decide the blood group. Each parent can donate one allele to child. Child can also have different blood group than parents in case when both parents have B blood group then they can produce the child having either B or O blood group. Other condition is when one parent has A and other has AB blood group then they can produce the child having A,B or AB blood group. Antigens ‘A’ and anti-B antibodies are present in A blood group. Antigens ‘B’ and anti-A antibodies are present in A blood group. ‘A’ and ‘B’ antigens are present in AB blood group but it has no antibodies. No antigens are present in O blood group but has both anti-A and anti-B antibodies. O is common among all blood groups. Receiving wrong blood group from donor can be life threatening.1 Blood groups are further characterized by presence or absence of RhD antigen. Red blood cells have this antigen on their surface. Blood group is positive if RBCs have this antigen and blood group is negative if RBCs do not have this antigen. In this way, total 8 blood groups are present. These are A+ blood group, Ablood group, B+ blood group, Bblood group, AB+ blood group, ABblood group, O+ blood group and Oblood group. From these, Ocan be given to anyone when required blood group is not immediately available.2 Hair can grow with different rates at different places of head. Follicles of hair do not depend on each other. They behave independently. For example in one case, when a person’s hair start to fall then he may lose all hair simultaneously. In other case the person’s hair may start to appear gray. The position of follicles actually determine their behavior. Some outer factors also affect their behavior. Average rate of growth of hair is 1.5 inches in one month. Male’s hair grow faster than female because of testosterone. Hair growth also depends on age for example in old age follicles stop growing that is why hair becomes thin. The hair growth completes in 3 cycles. When cycle is complete then it stops and a new strand of hair begins to form. This cycle completes in different time for different people that is why they have different hair growth rate. Different hair colors and follicle shapes also affect the timing of cycle thus People do not have same rates for growth of hair. Materials and methods