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Swimming Sperm
How long does it take sperm, immediately after bbd, to swim to the back of the uterus / entrance to the fallopian tube to wait for the egg to drop?
Thanks,
Lisa
Thanks,
Lisa
The article below may help you understand. The sperm must stay "bogged down" in fertile cm for at least 7 hrs to be fertile. Once they have gone through their transformation, they can travel in as little as 15 mins.
Once sperm are deposited in the vagina, they must travel through the cervical canal, through the uterus, and up to the egg in the upper third of the oviduct. Spermatozoa can reach the distal uterine (Fallopian) tube within 15 minutes after semen is deposited in the vagina. The vast majority of spermatozoa never make it. Many are destroyed by vaginal acid or drain out of the vagina. Others fail to penetrate the mucus of the cervical canal, and those that do are often destroyed by leukocytes in the uterus. Half of the remainder are likely to go up the wrong uterine tube. Finally, only about 2000 spermatozoa reach the vicinity of the egg.
Experiments have shown that freshly ejaculated sperm are infertile; they must be present in the female tract for at least 7 hours before they can fertilise an ovum. During the passage through the female reproductive tract, the sperm undergo a process of capacitation that makes it possible to penetrate an egg. The membrane of the spermatozoon head contains a substantial amount of cholesterol, which toughens it and prevents premature release of acrosomal enzymes. Fluids of the female reproductive tract slowly wash away cholesterol and other inhibitory factors in the semen. Most spermatozoa are fertile for a maximum of 48 hours. An ovum can stay in the uterine tube for at most 24 hours before it becomes incapable of undergoing fertilisation.
Once sperm are deposited in the vagina, they must travel through the cervical canal, through the uterus, and up to the egg in the upper third of the oviduct. Spermatozoa can reach the distal uterine (Fallopian) tube within 15 minutes after semen is deposited in the vagina. The vast majority of spermatozoa never make it. Many are destroyed by vaginal acid or drain out of the vagina. Others fail to penetrate the mucus of the cervical canal, and those that do are often destroyed by leukocytes in the uterus. Half of the remainder are likely to go up the wrong uterine tube. Finally, only about 2000 spermatozoa reach the vicinity of the egg.
Experiments have shown that freshly ejaculated sperm are infertile; they must be present in the female tract for at least 7 hours before they can fertilise an ovum. During the passage through the female reproductive tract, the sperm undergo a process of capacitation that makes it possible to penetrate an egg. The membrane of the spermatozoon head contains a substantial amount of cholesterol, which toughens it and prevents premature release of acrosomal enzymes. Fluids of the female reproductive tract slowly wash away cholesterol and other inhibitory factors in the semen. Most spermatozoa are fertile for a maximum of 48 hours. An ovum can stay in the uterine tube for at most 24 hours before it becomes incapable of undergoing fertilisation.
It depends, could be an hour, could be 24 hours. It depends on the swimmers and the environment.
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