I am an only child, are there any problems associated with being raised that way?
Only child
An only child is a person with no siblings, either biological or adopted. 
Children who have half-siblings or step-siblings, either living at the same house or a different house - especially those who were born considerably later - may have a similar family environment to only children, as may children who have much younger siblings from both of the same parents (generally ten or more years).
Overview.
Throughout history, only children were relatively uncommon. From around the middle of the
them sniffing themselves, but they certainly know what they smell like. Because of the way we structured this experiment, there is no other way they could have known the scent of their family. Any time you need to discriminate accurately among kind, this is the way to do it.”
Advantages and disadvantages.
There are several advantages associated with the armpit effect. The first advantage is that it prevents inbreeding. Inbreeding could cause many problems such as infertility and an increased chance of recessive traits being passed on.