Changes

* GOAL: To synchronize the donor and recipient to be in the same stage of the [[Oestrous Cycle - Anatomy & Physiology|oestrous cycle]].

* GOAL: To synchronize the donor and recipient to be in the same stage of the [[Oestrous Cycle - Anatomy & Physiology|oestrous cycle]].

* REASON: To prepare the [[Female_Reproductive_Tract_-The_Uterus_- Anatomy & Physiology|uterus]] of the recipient to support [[Blastocyst Embryonic Development - Anatomy & Physiology|preattachment embryogenesis]].  

* REASON: To prepare the [[Uterus - Anatomy & Physiology|uterus]] of the recipient to support [[Blastocyst Embryonic Development - Anatomy & Physiology|preattachment embryogenesis]].  

* HOW: Treat recipient with a hormonal regime that induces oestrus to occur at the same time as the donor.

* HOW: Treat recipient with a hormonal regime that induces oestrus to occur at the same time as the donor.

** Before the procedure is started, a local anaesthetic is injected to cause relaxation of the [[Rectum_- Anatomy & Physiology|rectum]].   

** Before the procedure is started, a local anaesthetic is injected to cause relaxation of the [[Rectum_- Anatomy & Physiology|rectum]].   

** At day 6-8 a specialized catheter has a small balloon that can be inflated to prevent retrogade flow of the flushing medium.

** At day 6-8 a specialized catheter has a small balloon that can be inflated to prevent retrogade flow of the flushing medium.

** A flushing medium is then introduced into the [[Female_Reproductive_Tract_-The_Uterus_- Anatomy & Physiology|uterus]], lavaged and returned through the catheter to a collection vessel.

** A flushing medium is then introduced into the [[Uterus - Anatomy & Physiology|uterus]], lavaged and returned through the catheter to a collection vessel.

* HOW:  

* HOW:  

** Both donor and recipient have a [[The_Ovary_-Corpus_Luteum_- Anatomy & Physiology|corpus luteum]] at similar stages of leutinization.

** Both donor and recipient have a [[The_Ovary_-Corpus_Luteum_- Anatomy & Physiology|corpus luteum]] at similar stages of leutinization.

** [[Female_Reproductive_Tract_-The_Uterus_- Anatomy & Physiology|Uterine environment]] in the donor and recipient are quite similar.

** [[Uterus - Anatomy & Physiology|Uterine environment]] in the donor and recipient are quite similar.

** A single embryo is placed into the uterine horn using a transfer pipette.

** A single embryo is placed into the uterine horn using a transfer pipette.

[[Category:Reproductive System]]

[[Category:Reproductive System]]