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For the sake of clarity in the following discussion, we will use the more restricted definition of capacitation as the process of gaining acrosomal responsiveness. These species differences may not seem so unusual when one considers that a single amino acid residue can determine the carbohydrate binding specificity of a lectin and that closely related animal lectins have different carbohydrate specificities Kogan et al. Finally, the architecture of the mucosal lining of the human Fallopian tube must act to slow sperm progress. Human Chretien, and bull Tampion and Gibons, sperm have been demonstrated to orient themselves along the long axis of threads of bovine cervical mucus. On the other hand, in some species, sperm may be inseminated days horses, cattle and pigs or even months some bat species before the arrival of the oocyte.

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Transport of sperm through the uterus is likely aided by pro-ovarian contractions of the myometrium.

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Thus, PDC may play a role in preserving bull sperm fertility while they are stored in the reservoir. Doppler flow sonography revealed increased perfusion of these anastomosing vessels on the side of the pre-ovulatory follicle Kunz, Smaller secondary mucosal grooves SG branch from the primary grooves. When vasectomized male rats were mated with females, the incidence of strong uterine contractions declined, indicating that sperm or testicular or epididymal secretions have stimulatory activity Crane and Martin, The role of ADAMTS-2, collagen type-1, TIMP-3 and papilin levels of uterosacral and cardinal ligaments in the etiopathogenesis of pelvic organ prolapse among women without stress urinary incontinence.

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