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The testis and spermatogenesis
14 other sections not shown
abnormal spermatozoa adult Alpine animals anoestrus artificial insemination artificial vagina breeding season breeds of sheep cervix collection tube decrease deep-freezing diluent dilution duration ejaculate embryo epididymis ewes feeding Figure flock follicle genetic glands gonadotrophins hormone increase injection intra-uterine insemination lambs Laparoscopic liquid nitrogen liquid semen litter luteolysis male sexual behaviour Merino months non-pregnant number of spermatozoa oestrogens oestrous behaviour oestrus oestrus and ovulation oestrus detection onset oocyte ovary ovulation ovulation rate ovulatory percent percentage of abnormal period photoperiodic PMSG pregnancy progestagen progesterone prostaglandin puberty ram semen rams and bucks reproductive activity seasonal breeders Seasonal variations secretion selection semen collection seminal plasma Sertoli cells sexual activity sexual season sheep and goats sires species sperm cells sperm concentration sperm production spermatogenesis spermatogenic spermatogonia spermatozoa sponge removal straws synchronization Table technique temperature testicular testis weight testosterone total number uterine horn uterus volume