UNIX System Call for creating process

Hell Sir,
This is chanikya
Is there any System call which behaves just like fork but i dont want to return back two times to the calling func.
In the following ex iam creating a child process in the called func but the ex prints two times IN MAIN.
i dont want to return back to the main two times and i want only one process

ex :-

calling()
{
fork();

}

main()
{
calling();
printf("IN MAIN\n");
}