I don't think it's unfair to criticize how highly variable the storytelling is. It starts out incredibly prompt and direct - leaving nothing to the imagination, introducing ideas very forthrightly in imagery or dialogue, and advancing the story in precise, concrete steps - before becoming just as incredibly, weirdly vague. As viewers we just have to kind of blithely accept on faith that everything is happening because of the jade vase seen at the beginning, and the evil that was attached to it is subsequently jumping from person to person. The storytelling switches back and forth, too, and meanwhile Lau Hung-chuen's direction is simply very straight; in the acting and in how scenes are orchestrated generally, there's not a lot of nuance to be had. Then again, in this case the predominant ethos isn't impactful drama, creeping horror, or even so much sinister vibes (though we do get some of those) as it is a spectacle of effects. 'Devil fetus' opts rather simply for shock value, and while some facets come off better than others, I'd be plainly lying if I said it weren't a wild, entertaining ride. This won't appeal to everyone, but for those open to all the wide possibilities of what horror has to offer, this is great!
There's a lot that gets thrown at us at one time or another, from the more straightforward horror-thriller approach of a person being pursued by an antagonist, to tinges of suspense and dark atmosphere; from supernatural splendor and madness, to the one-on-one showdown between priests or mystics and demons or practitioners of black magic, as we've seen in the likes of 1981's 'Bewitched,' or 1983's 'Ghosts galore.' Some of this is realized with stop-motion animation, stunts, and major moving set pieces, and at other times we get extensive blood, gore, special makeup, and gross-out effects. Sometimes we're treated to post-production digital additions that are more than a little outdated, and accompanying sound effects that are A Choice; sometimes this is realized through lighting, or tricky editing and cinematography. The preponderance of these are tangible creations, I should note, but one way or another, they all mostly look great! It's primarily through this that the horror element is realized, though even as the writing is variable, Wen-Hua and Cheng Ging-Jiu Lo whipped up a tale of violence, death, and otherworldly possession that's a wicked good time.
In all other capacities this is pretty well made, from art direction and costume design to the music. It may not be a title that wholly demands viewership, but it sits somewhere on a spectrum between B-movie and low-budget romp, and whether one is familiar with other genre flicks out of Hong Kong (be they from The Shaw Brothers, Golden Harvest, or as in this instance, Lo Wei Motion Picture Company), or like-minded fare like Sam Raimi's first 'Evil dead,' there's a recognizable kinship with other works. For the inelegance of how it presents it carries some rough edges, yet by and large 'Devil fetus' is fun, gnarly, well made, and satisfying, and even if it's not the most visceral of thrill rides, I think most anyone who appreciates horror will find it enjoyable. Don't necessarily go out of your way for this, but if you have the chance to watch 'Devil fetus,' these eighty-six minutes are well worth anyone's time!