First of all, congratulations to you.
Keep your hamster well-nourished. Added protein, like egg white, might be a good idea. It has been suggested that one of the reasons hamsters eat their young is because they need the protein from them after birth – but this has not been proven, and there are probably other factors.
PLEASE [...]
Tumours and Cancers usually occur in older hamsters. It is more common in females than in males. However, not to mislead hamsters owners, it does happen to males too.
Internal tumours such as those involving internal organs, for example lungs, heart, kidney, may be difficult to treat. However, many external tumours can be successfully surgically removed [...]