<unk>  is performed weekly, as the fetus is assumed to be healthy after a negative test and should remain so for another week. This test is done in hospital or clinic setting. External fetal monitors are put in place and then either nipple stimulation or IV pitocin (oxytocin) is used to stimulate uterine<unk> s. Nipple stimulation This is a procedure that relies on endogenous release of oxytocin following nipple stimulation, and is conducted by the patient. The nurse instructs the patient on the procedure, as follows. One nipple is massaged gently through clothing until a<unk>  begins, or for a maximum of 2 minutes. If at least 3<unk> s in 10 minutes is not achieved, then the patient rests for 5 minutes and the other nipple is stimulated. Oxytocin challenge test (OCT) If adequate<unk> s (at least 3 in 10 minutes) cannot be achieved with nipple stimulation, an oxytocin challenge test may be performed. It involves the intravenous administration of exogenous oxytocin to the pregnant woman. The target is to achieve around three<unk> s every ten minutes. Interpretation Result Interpretation Positive Presence of late decelerations with at least 50% of the<unk> s Negative No late or significant variable decelerations, with at least 3 uterine<unk> s (lasting 40 seconds) in 10 minute period. Equivocal—Suspicious Presence of late decelerations with fewer than 50% of<unk> s or significant variable decelerations. Requires repeat testing on following day. Equivocal—Tachysystole Presence of<unk> s that occur more frequently than every 2 minutes or last longer than 90 seconds in the presence of late decelerations. Requires repeat testing on following day. Equivocal—Unsatisfactory Fewer than three<unk> s occur within 10 minutes, or a tracing quality that cannot be interpreted. Requires repeat testing on following day.
Contraction stress test
Evocative/suppression testing
Combined intracavernous injection and stimulation test
Cold pressor test
Videonystagmography
Provocation test
Double dye test
Lateral flow test