The question of time: after how much pregnancy occurs

Whether conception is a long-awaited or undesirable event, that it happened, it is better to learn as early as possible. So, after how much does pregnancy occur after an unprotected sexual intercourse?

In order to understand this, you need to turn to the mechanism of conception in humans. After maturation of the dominant follicle in one of the ovaries, an egg leaves it. After ovulation, it moves to the uterus on the fallopian tube, leaving a trace of special substances behind it to make it easier for spermatozoa to detect it. Fertilization occurs on the way to the uterus, and the moment when the germ cells merge, depends on the day of the cycle. More accurately, to determine after how much pregnancy occurs after sex, information about the life span of female and male sex cells will help.

It must be taken into account that spermatozoa live in the fallopian tubes and the uterine cavity for up to 5 days - those of them who have not been harmed by the acidic environment of the vagina and the ciliated epithelium of the tubes. Acidity in the woman's vagina (Ph) is 6, and after 2 hours she kills all the male sex cells that continue to remain in it.

On the eve of ovulation, another obstacle on the way to the uterus is eliminated: the mucus plug closing the cervical canal liquefies under the influence of hormones. The goal of all these stages of selection is to give way only to the most healthy, fastest and most durable carriers of genetic information. In any case, only one sperm penetrates the membrane of the egg and the nuclei of the two cells merge. When does pregnancy occur after conception? A single-celled fetus (zygote) is formed within 12-24 hours after ovulation, even if the sexual intercourse took place 3-4 days before.

It is noteworthy that in the event that more than one spermatozoon penetrates through the ovum shell, such an embryo is not viable. In the first weeks of pregnancy, the regulatory systems of the female body reject such a "defective" fruit, and a woman may not even know about the pregnancy that has not taken place: menstruation will come on time or a little later.

If the pair is facing the task of successful conception, then the question - after how much pregnancy sets in, is very relevant. After all, to leave the ovary egg could be fertilized, a certain (very high) concentration of live spermatozoa in the semen is important. Insufficient concentration is one of the causes of male infertility. Therefore, before the X-hour, sexual abstinence is required for 2-3 days.

To find out, after what time the pregnancy occurs, which precedes maturation of the follicle, basal temperature measurement and ovulation tests will help. The first method is more labor-intensive and requires high accuracy. The second is more convenient: the test strip can be lowered into a container with urine at any time of the day. The concentration of luteinizing hormone LH will accurately determine the phase of the cycle. 12 hours before ovulation, the concentration in the body of this substance is maximal, which will be clearly indicated by 2 strips. The surest way to reach the goal is to make love immediately after a positive test for LH.

It must be understood that although formally a new life arises at the time of the fusion of the sex cells, the fetal egg must still go a long way to the uterus. Through how many there comes pregnancy, by which understand introduction of a fetus in a uterine cavity? If there are no obstructions in the fallopian tubes, that is, areas of obstruction, approximately 10 hours after the nucleus fusion, the new cell will enter the uterus cavity and try to fix it there. If, for some reason, the movement slows down to 2-3 days, there is a risk of an ectopic pregnancy. Then the fruit is doomed, and there is a threat to the life of the mother.

Implantation of the fetal egg is necessary for its nutrition, because the reserves of the yellow body are not enough for a long time. Problems can arise if the endometrium is very thin, or there are scars and myomatous nodes in the uterus. A foreign body, such as a spiral, prevents the egg from gaining a foothold in the proper place. If there was no scraping and surgical intervention in the woman's history, then most likely the implantation will be successful, and the chorionic villi will grow into the vessels of the endometrium. Now the life that has arisen is not threatened, the nutrition and supply of the embryo with oxygen will occur through the mother organism.