Changes

* Cervical mucosa produces a mucous secretion which forms a mucous plug that helps close the cervical canal.  This is easily expelled during [[Reproductive_Behaviour_-_Oestrus_Behaviour_-_Anatomy_%26_Physiology|oestrus]] and [[Reproductive_System_-_Anatomy_%26_Physiology#Parturition|parturition]].

* Cervical mucosa produces a mucous secretion which forms a mucous plug that helps close the cervical canal.  This is easily expelled during [[Reproductive_Behaviour_-_Oestrus_Behaviour_-_Anatomy_%26_Physiology|oestrus]] and [[Reproductive_System_-_Anatomy_%26_Physiology#Parturition|parturition]].

* Barrier to sperm transport in the ewe, cow, bitch and queen, but not in the sow and mare.

* Barrier to sperm transport in the ewe, cow, bitch and queen, but not in the sow and mare.

* Assists with the storage and survival of sperm by admitting sperm to the genital tract at a time when [[Fertilisation%2C_Implantation_and_Early_Embryonic_Development_-Fertilisation-_Anatomy_%26_Physiology|fertilisation]] is possible (around ovulation).

* Assists with the storage and survival of sperm by admitting sperm to the genital tract at a time when [[Fertilisation%2C_Implantation_and_Early_Embryonic_Development_-Fertilisation-_Anatomy_%26_Physiology|fertilisation]] is possible (around [[The_Ovary_-_Ovulation_-_Anatomy_%26_Physiology|ovulation]]).

* Mucus production for lubrication and to prevent microorganisms from entering the uterus.

* Mucus production for lubrication and to prevent microorganisms from entering the uterus.

* Remodels itself at the end of gestation to allow birth and to stimulate the development of maternal behaviour.

* Remodels itself at the end of gestation to allow birth and to stimulate the development of maternal behaviour.