By Jonatas Dornelles
Within occidental reasoning, until the 17th century, there used to be believed that human reproduction would ensue upon the growth of a grown up miniature embedded in the woman’s ovule somehow . Only by the discovery of human spermatozoa, in 1677, by the Dutch naturalist Anton van Leeuwenhoek, that such role got weighed in.
From then onwards, such miniature of humanoid could no longer exist within the ovule and the spermatozoid at the same time. To the day is known that the shaping up of a new individual springs, under normal conditions, out of the fusion of these two devices into the woman’s sexual organs, a deed known as fecundation.
Fecundation only occurs when there’s fusion of spermatozoid and ovule taken place. Such matching up is ensured by the leverage of spermatozoa, by their enormous amount released within ejaculation (circa 300 million), yet, by the somewhat enlarged measurements of the ovule in relation to the spermatozoid (whose head bears 25 times less bulk than the ovule itself).
It’s been already verified that, if the rough amount of spermatozoa laid in the vaginal cervix bears lower than 150 million (even lower to some physicians accordingly) the likelihood of fecundation gets drastically reduced. In order to stricken fecundation takes the spermatozoids migrating through the existent ducts in the woman’s sexual organs, until bumping into the ovule.
Migration wise the quality of ejaculated semen goes by, the location in which is laid, anatomical and functional fitness of the vagina, cervix and uterine corpus and so tubes. Semen gets compounded not only by spermatozoa, but also many other substances meant to fender for the fertilizing capability of trace elements as such.
Semen altering characteristics within likely factors come coupled with raised core temperature, traumatism and infections in the male sexual organs, varicocele (vascularization in the spermatic string, inside that burse that holds the testicles in), viruses ridden diseases (like mumps), malnutrition, emotional breakdown, and physical fatigue.
Ratings in semen might vary according to sexual activity demand, as the semen’s fertilizing capability might get reduced if lapsed time in between sexual relations is either too long or too short. Once inside the vagina offloaded during penetration, the semen undergoes profound modifications by the vaginal matter.
In light of the highly acidic environment, the bulk of spermatozoon dies, to the extent that only a small amount of them gets to go up stream. Their break up into the uterine cervix can only take place in the week ovulation ensued (when one of the ovaries freely an egg), given the discrepancy in readings for trace elements in the cervix mucosa, i.e. the filing secretion within the cervix duct leading to the uterus.
Also migration by spermatozoon towards the ovule hinges on the action of compounds presented in the semen (prostaglandin). While they’re being absorbed through the vaginal walls, these compounds enable those orifices embedded in the uterine cervix and tubes to open up easily.
Then the spermatozoids do sip through the hollowed tissue and finally reach out the rendezvous spot, wherein only one of them comes to couple with the ovule, given origin to a new being altogether.