Female Procedure Removes Leaves Hormones Heat cycle Pyometra maintained Fertile (uterine infection) Ovary Sparing Uterus. At Yes Has a heat No Spay (OSS) Cervix and least cycle and (Hysterectomy) 1 ovary one may have may also be ovary bloody removed vaginal depending discharge. on Fertile - No Tubal ligation Removes a Yes Yes Yes portion of Not fertile the oviducts cervix Ovariectomy Ovaries Uterus No No/No No only and cervix Ovaries Part of No No/No No (Traditional and uterus uterus Spay and cervix Male Procedure? Removes? Leaves? Hormones Fertile? maintained? Vasectomy Part of Yes No (2 months vas after the deferens procedure) Zinc Neuter Nothing. Yes, but reduced by No (Zeuterin) Injection 49-52% modifies within the testicles
Female Procedure Removes Leaves Hormones maintained Heat cycle Fertile Pyometra (uterine infection) Ovary Sparing Spay (OSS) (Hysterectomy) Uterus. Cervix and 1 ovary may also be removed depending on At least one ovary Yes Has a heat cycle and may have bloody vaginal discharge. Fertile - No No Tubal ligation Removes a portion of the oviducts cervix Yes Yes Not fertile Yes Ovariectomy Ovaries only Uterus and cervix No No/No No (Traditional Spay Ovaries and uterus Part of uterus and cervix No No/No No Male Procedure? Removes? Leaves? Hormones maintained? Fertile? Vasectomy Part of vas deferens Yes No (2 months after the procedure) Zinc Neuter (Zeuterin) Nothing. Injection modifies within the testicles Yes, but reduced by 49-52% No