Implantation bleeding: the first sign of pregnancy
Recently, more and more women go to the doctor with the problem of infertility.That just did not take a woman to get pregnant, and then hoping to listen to the slightest changes occurring in the body, whether the pregnancy has not occurred.It would seem ridiculous to look for signs of pregnancy before missed period, but the fact remains, and the very first signs of conception occurred can be determined before the expected menses.For one of these signs include implantation bleeding.Unfortunately, this feature is not 100% reliable, so the possibility of pregnancy can be determined only after a week or two delay menstruation.
initial stages of pregnancy
Home pregnancy consists of several stages:
It ovulation Ovulation - How to determine as accurately as possible? , or maturation of eggs capable of fertilization is the first step on the path to pregnancy.Ovulation is controlled by hormones that are produced in the pituitary gland, and the average comes to the twelfth - sixteenth day of the menstrual cycle.In the first phase (follicular) ovarian cycle begin to form ten to twelve follicles (this process is regulated follicle stimulating hormone).In the future, among the follicles is determined by the most "major" or dominant follicle, which upon reaching maturity shall cast them out of the egg itself.That is, ovulation is nothing, as the output of the mature egg into the abdominal cavity, which occurs under the action of luteinizing hormone.The viability of the egg is retained for one day, a maximum of two.
After the release of an egg from the ovary into the abdominal cavity, it is sent to the fallopian tube where under favorable circumstances it takes place meeting with sperm.The most active and moving sperm is introduced into the egg and fuses with its nucleus, which is called the direct fertilization.Before the sperm merges with the egg, it can take from three to six hours.
after fertilization, which by this time already called a zygote, continues to move along the fallopian tube to reach the uterus.During the movement of the zygote divides and hard at the time of entering into the uterus turns into a blastocyst.The blastocyst is a comfortable place in the functional layer of the endometrium (usually the upper front wall of the uterus or verhnezadnyaya) and begins to be implanted.The implantation takes place in two stages.First blastula stick (adhesion step) to the lining of the uterus, and then it starts to produce proteolytic enzymes that dissolve the functional layer, and is immersed or embedded in its thickness.This process is called implantation.
What is implantation bleeding
Implantation bleeding - this bleeding, which occurs at the time of implantation (introduction) of the ovum in the functional layer of endometrium.The duration of "travel" a fertilized egg from the fallopian tube to the uterus lasts six to twelve days.That is about the time after intercourse may cause bleeding Spotting - it is important to rule out pathology .Implantation bleeding does not occur in all women, and many do not notice it at all.
highlight color when Implantation bleeding can vary.There are pink, dark brown or red discharge.The duration of implantation bleeding is a few hours, but there may be deviations (one-two days).Normally implantation bleeding should not be intense, as a rule, one or two drops of blood onto the laundry.In the event of more severe discharge should exclude gynecological pathology (cysts, dysfunctional uterine bleeding) or spontaneous miscarriage in early pregnancy.The emergence of implantation bleeding caused by microscopic damage the walls of blood vessels at the site of the introduction of the egg in the uterine lining (near the site of implantation is marked dilation of capillaries and venules).
Implantation bleeding refers to the first signs of pregnancy, which is evident even before the positive test results.Some women at the time of implantation bleeding noted weakness and nagging abdominal pain that does not belong to the pathology of pregnancy.
The timing of implantation bleeding.If the menstrual cycle is 30 days, ovulation occurs on day 13-16, which corresponds to the middle of the cycle.Implantation occurs 6-12 days after fertilization, ie 18-28 days of the menstrual cycle days of the menstrual cycle: Four phases , that is, the day before menstruation.That is why many women do not pay attention to the appearance of spotting before menstruation Discharge before menstruation - that is the norm? and passed the time of implantation bleeding.