Women: intrinsically evil or tragically misunderstood? If this strikes you as a fruitful topic of discussion, then you may wish to see  or perhaps I should say endure  Lars von Trier’s “Antichrist,” a film that has already set off carefully orchestrated frissons of disturbance at film festivals around the world. It starts with a slow-motion, black-and-white sequence, scored to a Handel aria, of graphic sex (with a snippet of hard core thrown in just for fun) and climaxes with two vivid scenes of genital mutilation.

Mr. von Trier has said that making the movie helped him overcome a crippling depression. I’m glad he feels better. He has certainly lost none of the impish, assaultive sensationalism that has made him both a darling and a scapegoat of film critics. But the formal rigor and intellectual brio that made his best films  “Breaking the Waves” and “Dogville”  as hard to dismiss as they were easy to loathe seems to have abandoned him. The scandal of “Antichrist” is not that it is grisly or upsetting but that it is so ponderous, so conceptually thin and so dull.

The story is simple enough, and arises from a precipitating calamity laid out on the very first page of “Melodrama for Dummies”: the death of a child. During the sexual ecstasy of the opening scene, as a nameless couple played by Willem Dafoe and Charlotte Gainsbourg grapple on nearly every piece of furniture and appliance in their apartment, their son, a toddler, climbs from his crib and makes his way to an open window. He tumbles out, along with his teddy bear, at what seems to be precisely the moment of his mother’s orgasm.

The rest of “Antichrist,” divided into chapters and shot in weird, pulsating, muted digital color by Anthony Dod Mantle (“Slumdog Millionaire”), explores the aftermath of this fatal incident, and expands on its implicit linking of female sexuality and death. The mother is mad with grief and guilt, and Ms. Gainsbourg’s anguished, naked (literally and otherwise) performance is, at least in the film’s first half, its only genuinely harrowing aspect. Following in the footsteps of Emily Watson in “Breaking the Waves,” Bjork in “Dancer in the Dark” and Nicole Kidman in “Dogville,” she allows herself to be pushed and provoked toward brave and extraordinary feats of acting in a dubious cause.