Changes

* Cervical mucosa produces a mucous secretion which forms a mucous plug that helps close the cervical canal.  This is easily expelled during [[Oestrus Behaviour - Anatomy & Physiology|oestrus]] and [[Reproductive_System_- Anatomy & 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 [[Oestrus Behaviour - Anatomy & Physiology|oestrus]] and [[Reproductive_System_- Anatomy & 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 & Physiology|fertilisation]] is possible (around [[Ovulation - Anatomy & Physiology|ovulation]]).

* Assists with the storage and survival of sperm by admitting sperm to the genital tract at a time when [[Fertilisation - Anatomy & Physiology|fertilisation]] is possible (around [[Ovulation - Anatomy & Physiology|ovulation]]).

* Mucus production for lubrication and to prevent microorganisms from entering the [[Uterus - Anatomy & Physiology|uterus]].

* Mucus production for lubrication and to prevent microorganisms from entering the [[Uterus - Anatomy & Physiology|uterus]].

* Remodels itself at the end of [[Reproductive_System_- Anatomy & Physiology#Gestation|gestation]] to allow birth and to stimulate the development of maternal behaviour.

* Remodels itself at the end of [[Reproductive_System_- Anatomy & Physiology#Gestation|gestation]] to allow birth and to stimulate the development of maternal behaviour.