Depois das dicas descobertas ontem surgiu a dúvida sobre a duração de vida do espermatozoide dentro do corpo da mulher. Eu dizia que eram uns 3 ou 4 dias, o tiago dizia 24 horas. Sendo assim resolvi ir pesquisar. Mas parece que não somos só nós os dois a dizer sim ou sopas...
In the proper environment, such as the female reproductive tract beyond the cervix, sperm have a
life-span of up to five days. In other environments, such as the vagina, sperm live only a few hours and even less than that outside the human body, exposed to the open air. The egg, on the other hand, has a life-span of only about twenty-four hours from the time it bursts from the ovary. So, fertilization can occur anytime live sperm meet up with a live egg, which can happen even if the sperm are deposited up to five days in advance of ovulation.
http://www.goaskalice.columbia.edu/0797.html
Sperm can live inside the female reproductive organs
for up to seven days, based on current data; it was once thought to be less. An egg cell, ovum, can be fertilized for up to 48 hours following ovulation. This means an average woman can become pregnant if sperm comes in contact with her vulva or vagina during nine days, each menstrual cycle. The challenge lies in determining those nine days. As the rate of effectiveness of this birth control method indicates, that is not an easy task.
http://www.the-clitoris.com/f_html/qa_8/qa8_2.htm
Studies indicate that the sperm with the X chromosome - or female chromosome - have a longer life span than the male sperm (with the Y chromosome).
http://www.ovulation-calculator.com/pregnancy/gender-prediction.htm
The usual life span of a sperm is estimated to
be about 24 hours; while the life span of ovum is estimated at 12 hours. So a coitus to be capable of fertilisation, must take place within twelve hours of ovulation (release of ovum from the ovary).
http://www.hindustanlink.com/sex/infertiliy-male.htm
(este era um site sobre infertilidade, quiçá não estariam a fazer as coisas mais difíceis para que as pessoas com este problema não se sintam tão mal)Sperm are thought to retain fertilizing capability for
up to 48 hours once they have entered the female genital tract, but it's
possible their lifespan is even longer.
Sperm production by the testicle takes about 90 days; the immature sperm are then deposited in a receptacle called the epididymis. They remain there until the time of ejaculation, when they undergo further maturation and develop their swimming ability. We do not know exactly how long they live once they reach maturity. Optimal semen specimens occur with ejaculation every two or three days. As the length of time between ejaculation increases, the percentage of normal, motile sperm in a semen sample progressively decreases.
Repeated ejaculations at intervals of 24 hours or less may result in sperm depletion and a drop in numbers of 30 percent or more. Muscular contractions usually diminish with subsequent orgasms, which also contributes to lower sperm volumes and counts.
http://health.ivillage.com/infertility/infertmen/0,,5ll4,00.html
How long sperm can live in the open-air depends on the situation, what kind of environment it's in and how much sperm is present. But, on average, sperm can't live for much longer than a few hours in the open-air. It's important to remember that if sperm is inside a women's body, it
can survive for up to seven days.
http://www.thesite.org/sexandrelationships/askthesiteqandas/sexualhealthqandas/thelifespanofsperm
Etiquetas: engravidar, espermatozoide
