ANS3319C_Sperm_Transport_Key_Final_Topic11

ANS3319C_Sperm_Transport_Key_Final_Topic11 - ANS 3319C...

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ANS 3319C Reproductive Physiology and Endocrinology Fertilization 110 Sperm Transport, Capacitation, & Fertilization 1) Site of semen deposition natural mating Cranial vagina :cow, sheep, rabbit, primates, dog, cat, rodents: Rodents: gel plug for produce vagina, prevents retrograde sperm loss Cervix : Pig Gel fraction: retrograde sperm loss Cervical lumen into uterus: horse Gel fraction: retrograde sperm loss 2) Site of semen deposition artificial insemination Transcervical: mare, cow, sheep (Fig 12-6) Intracervical: sow (Fig 12-7) Intravaginal: dogs & cats (Fig. 12-7) 3) Sequence of events post copulation (Fig 12-1)
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ANS 3319C Reproductive Physiology and Endocrinology Fertilization 111 4) Sperm loss from tract Retrograde transport Phagocytosis by neutrophils (WBC): vagina & uterus (Fig 12-2) Due to estrogen exposure Prevent microorganisms from colonizing in tract Digest some sperm (foreign to female) No real (-) effect on fertility 5) Cervix function Barrier: non-motile, abnormal, & dead sperm Reservoir for sperm Mucous secretion (amount varies between species) Cow: two types of mucous (Fig 12-5) Sialomucin : low viscocity, secreted by basal cells of crypts
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ANS3319C_Sperm_Transport_Key_Final_Topic11 - ANS 3319C...

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