There can be all sorts of reasons why a birth certificate cannot be found within records of General Registration. The GRO was set up in 1837, and was the first time all births, marriages and deaths were systematically recorded by a non-religious body.
But sometimes entries, particularly births, may not be forthcoming despite careful searches. It could be that a birth was not registered, which is more likely in the earlier years of civil registration. However, before concluding that this is the case, it is important to make sure that all possible scenarios are covered.
Was the birth registered with a variant spelling, of the forename or surname? For example the name Smith could be rendered Smyth or Smythe. And Ann could be Anna, Annie or Anne. Using the wildcard option within search engines can help find spelling variants.
Did the birth take place prior to the parents marriage? In this case, it would probably be recorded under the mother's maiden surname.
Check the dates searched - was your ancestor a little older, or younger, than later records suggest?
Was your ancestor born outside of England or Wales, such as in Scotland, Ireland or even farther afield?
Using these tips, searches of civil registration can be made a comprehensive as possible.
