Managing peak arousal relies on different mechanisms in men and women, although common principles work for both.
For men, reducing or completely stopping movement as ejaculation approaches, contracting the pelvic floor muscles (aka Kegel muscles) — this stops the process close to the “point” without ejaculation.
For women: Since a woman's peak arousal is less "irreversible" (it is more difficult to prevent an orgasm than to prolong it), the focus is usually on managing intensity, not on holding it in.
The common tool of breathing For both, slow, deep breathing is activated in the same way—activating the parasympathetic system reduces immediate physiological stress.
The challenge of synchronization Since two partners often have different “paces” for reaching their peak, open communication about who is where in the process helps both of them arrive at the same time or in the desired order.