primary school teacher will give birth in a matter of weeks to four babies , conceived following 18 months of fertility treatment .
miss raunigk , who features in documentary on german television tonight , said she was not too worried about the birth , adding : ` i feel fit .
i do n't think i will have any problems .
` once the physician established that there are four babies inside me then i had to do some thinking .
miss raunigk 's physician , dr kai hertwig , said everything was going well .