Gamete physiology and timing of ovulation and fertilization in dogs.

摘要: Ovulation in most bitches occurs between 48-60 and 72 h from the onset of oestrus. The eggs are ovulated as primary oocytes not capable being fertilized until about 60 after ovulation when they undergo first meiotic division to become secondary oocytes. By this time ova have descended through two-thirds oviduct. Ova fertilizable undergoing at 108 ovulation, i.e. for a period 48 h. during which spermatozoa remain fertilization female reproductive tract is thought be 5 days. mating conception possible thus 7 days