To my knowledge, she should travel before the onset of the seventh month but you can confirm this from travel agents or airlines flying to India. That's how it was when my wife was travelling several years back and she was pregnant. Regarding documents from the doctor, I believe they are not required at the airport and this can be confirmed by the airline people also. However, I suggest she carry a report from her doctor to allow for the doctors to continue with her progress in your country. As for the new born child's arrival and RP, from what I learnt at QL the visa for the child is issued at the airport as long as he is not over two months old (or may be three months, I am not sure) which must be supported by a birth certificate. Please check on this with the mandoob of your company.