Technical and medical information products and services.


How long spermatozoa is active? Technical and medical information products and services.

Many people think that a sperm can only fertilize an egg within a few hours. In fact, this is not the case: the minimum life span of a healthy male germ cell is 24 hours, and some spermatozoa can survive for more than a week! The difference in the life span of spermatozoa is not accidental; they are divided into two types – X and Y, on which the sex of the unborn child depends. Spermatozoa with a “charge” Y (contain the sex chromosome Y) at conception determine the male sex of the embryo, and those containing the X chromosome lay the formation of the female sex. It is important to note that the spermatozoa of these groups differ not only in terms of genetic factors that later determine the sex of the embryo, but also in terms of physical properties. Long-term studies in the field of embryology and genetics have shown that these types of spermatozoa differ in size, shape, movement speed and resistance to adverse environmental factors. If you want to get pregnant, but you facing some complications in bed- the best is to try Generic Viagra,it will help you to cope the problems in intimate sphere. Pills to increase potency Viagra can be called the safest on the list of the same action drugs. Generic Viagra men’s pills of the new generation. The best drug.

Future boys – spermatozoa Y – differ in small sizes and are equipped with a longer “tail”, allowing to develop a significant speed of movement. Thus, the spermatozoa of group Y are very mobile and active, which under other favorable conditions gives them significant advantages for fertilization. However, spermatozoa with a charge Y also have disadvantages – they are not resistant to aggressive environmental conditions (high and low acidity, temperature changes). Another disadvantage of “sperm-boys” is low life expectancy. Even after contact immediately after ejaculation in the most favorable environment, Y-spermatozoa live on average no more than 24 hours. In contrast, the spermatozoa of group X, larger and, therefore, less mobile, much better adapt to external unfavorable conditions and retain the ability to fertilize at times up to 1-1.5 weeks! In medical studies, even cases of “conservation” of spermatozoa X in the vaginal vaults for the period of menstruation and subsequent conception at the beginning of the next menstrual cycle are even described. By the way, this is one of the reasons explaining the possibility of conception during menstruation – X-spermatozoa can just wait for ovulation! Therefore, the opinion that the sperm cell is determined by several hours is absolutely unreasonable. Unlike an ovum, whose life span after ovulation on average lasts no more than 24 hours.

Fertilization of the egg

Some spermatozoa can fertilize an ovum. According to this version, the probability of conception is similar to a grant competition on a competitive basis. In part this corresponds to reality, since the way of spermatozoa to the egg consists of continuous tests and obstacles (acidic environment of the vagina, a sticky secret in the cervical canal, and finally two fallopian tubes, only one of which has a mature egg). In this sense, one can really consider that the future participant of fertilization is revealed in the process of the competition for survival, in which, naturally, the strongest wins. However, only one spermatozoon always participates in the fertilization process – even if several male sex cells were moving simultaneously to the egg cell.

The shell of the sperm head contains a special substance – an enzyme that is able to dissolve the shell of the egg. As soon as one of the spermatozoa reaches the target and touches the egg, its shell dissolves at the point of contact; this effect lasts a fraction of a second, during which the spermatozoon appears inside the egg, after which it again becomes impenetrable, and the remaining spermatozoa – “competitors” remain with nothing. Immediately after the connection of the spermatozoon and the egg, the fusion of their nuclei takes place and the exchange of genetic information is the laying of a new DNA for the unborn child. Even in the case of multiple pregnancies, only one sperm fertilizes one ovum.

Twins are obtained as a result of dividing the already fertilized egg into two equal halves – this is due to a genetic malfunction and can be inherited; such twins are always of the same sex and are similar as two drops of water. Another variant of multiple pregnancies is fraternal twins – it is formed as a result of poliovulation (simultaneous maturation of several eggs at once or in different ovaries); here the reason is more often in hormonal imbalance. The raznoyaytsevye twins can be of different sexes; they are very similar or completely unlike each other, just like children from the same family who were born at different times. However, in this case, there is only one spermatozoon per ovule.