The Tiyanak or Tianac are vampire-like creatures in Philippine Mythology. Although not considered by the Filipinos as vampires but as zombies, the tiyanak have some vampiric characteristics as they are examples of Half-Vampires who were cursed to become a vampire.
It is said that when a pregnant mother's baby dies before or after childbirth and is buried without baptism or proper funeral, the baby rises from the dead to kill his/her mother or simply asks to be given proper funeral.
The tiyanak can be a fetus or a full infant. Like many vampires it can be hurt by sunlight and stays away from garlic. It also has immortality and rises from the dead.
To prevent tiyanak rising from the dead, give them a proper funeral and baptism.