"Slitheen" is just the aliens' family name. They are actually Raxacoricofallapatorians.
A doctor who has specialised in blood called a Hematologist.
hematologist
A blood doctor is a hematologist, usually someone is both a hematologist and an oncologist (cancer doctor)
Hematologist
i'm not saying it was aliens but, it was aliens
They are called the silurians.
Farringham School for Boys
insulin
Hormones.
None of the Doctor's (real) children have ever been seen onscreen, or mentioned by name. The Doctor originally travelled with his granddaughter, Susan. In the 2008 episode 'The Doctor's Daughter' aliens steal some of the Doctor's DNA and use it to create a clone named Jenny who regards the Doctor as a father as she was created from him.
Consult a doctor or you can just say STOP IN THE NAME OF JESUS!