Ananova - Oral sex makes pregnancies safer and more successful - study New research suggests oral sex may not only help a woman conceive but may make her pregnancy safer and more successful.
The Australian study found that semen contains a growth factor which helps persuade a mother's immune system to accept sperm.
It claims to have found evidence that regular exposure before pregnancy, especially by mouth, helps her immune system get used to her partner's sperm.
Disorders during pregnancy often stem from the battle between the immune system and the foetus as a 'foreign body'.