Hi- No. It's best to think of IGCSEs as an exam board, like edexcel or aqa (Although they will be done through an exam board like this themselves). Sometimes they are easier, and they can be used to apply to A-Levels/ further education in many different countries, so they are very useful if you're planning to move country.
Some of my GCE (The level of qualification that a GCSE is) were IGCSEs, and they make no difference on your application to UK sixth forms. They give you exactly the same qualification as a regular GCSE.
Is it possible you're confusing IGCSEs with something like IBs? These are alternatives to A-Levels that you can use to get into universities, but might be more vocational or hands-on, depending on what you do.
Good luck!