When do the first signs of pregnancy appear? As already noted, not earlier than 7 days after sexual contact.
The following signs allow you to suspect pregnancy even before a missed period:
Implantation retraction.
This sign is determined by the graph of basal temperature, which is measured in the rectum. Only the woman who carefully and for a long time (at least 3 months) keeps a graph of the temperature curve is able to identify this sign.
On the eve of ovulation, the temperature drops by 0.2 - 0.4 degrees, but from the moment the egg leaves the follicle, the temperature rises sharply and becomes higher than 37 degrees. At this level, it lasts for about 12 - 14 days, and before the onset of menstruation, it begins to decline. Before the introduction of the egg into the endometrium, the production of progesterone decreases somewhat (after all, it is towards the end of the menstrual cycle), since the body is not yet aware of the fertilization that has occurred. But as soon as implantation has occurred and connections have been established between the fetal egg and the mother's body, the trophoblast begins to produce hCG, thanks to which the body is rebuilt to a pregnancy maintenance program. That is, the corpus luteum continues to produce progesterone, which supports the further growth and development of the embryo, and, accordingly, the basal temperature rises.
Later, after a delay in menstruation, the basal temperature exceeds 37 degrees and indirectly confirms pregnancy.
Implantation bleeding.
The process of introduction of the blastocyst into the thickness of the uterine mucosa may (but not necessarily) be accompanied by small bleeding. Blood discharge is due to the destruction of the walls of the vessels of the uterine mucosa. Do not expect obvious and too noticeable selections. There may be a bloody or pinkish discharge in the form of a couple of drops on linen or toilet paper. Implantation bleeding should be expected within 7 to 12 days from the date of sexual intercourse. If there were no “suspicious” discharges, this is not considered a pathology, just as it does not confirm or deny a possible pregnancy.
Feelings in the lower abdomen.
After implantation, the blood supply to the genital organs, in particular the uterus, changes. The blood flow to the pelvic organs, in particular to the uterus, increases significantly, which improves its blood supply and provides the fetus with nutrients and oxygen. Therefore, for many women, one of the first signs of pregnancy before a delay is a feeling of fullness in the lower abdomen. Light tingling and even sipping are also possible, which is not a pathology (after all, the uterus begins its increased growth).
For the same reason (increased blood flow in the pelvis), hemorrhoids may appear or worsen, or veins in the legs may appear (the first sign of varicose veins). Undoubtedly, hemorrhoids and varicose veins are more likely to occur in the second half of pregnancy, when the uterus is already of considerable size and compresses the inferior vena cava, but in multiparous people, these phenomena can appear very early, even before the delay.
Unstable emotional state.
Before the onset of the expected menstruation, most women, unaware of the new life that has arisen in them, become absent-minded and forgetful, or, on the contrary, too irritable and aggressive. Unexpected tears are suddenly replaced by laughter and vice versa. The reason for this is progesterone, which is produced to maintain pregnancy. But the lability of the psyche is quite possible with premenstrual syndrome, therefore, only those women who have had no PMS symptoms before can suspect pregnancy on the basis of this symptom.
Slight discomfort.
For a very short time, a woman may feel signs of a cold: mild malaise, fatigue, headache. A slight increase in body temperature is also possible, which, again, is associated with the action of progesterone on the thermoregulatory center. As soon as the embryo is fixed in the uterine wall and begins to actively "cooperate" with the mother's body, there is a decrease in immunity in the mother's body, which prevents the rejection of the fetal egg as a foreign body.
Feelings in the chest.
This symptom can also be attributed to the phenomena of PMS. From the moment of conception, sensations in the mammary glands change dramatically. That is, before a woman did not feel her breasts at all, but now the slightest touch to her breasts causes pain. Swelling and swelling of the breast is also noted.
Arterial hypotension.
A decrease in blood pressure is noted from the first days of pregnancy. Under the action of progesterone, the tone of smooth muscles decreases, including the muscle layer of the vascular wall, which leads to relaxation of the vessels and an increase in their diameter.
Frequent urination.
Urination from the first days of pregnancy becomes more frequent, but remains painless. This symptom is due to the action of the same progesterone, increased blood supply to the pelvic organs, including in the bladder and kidneys, which increases renal filtration and urine production. Pregnancy urination persists until the very birth (in later periods, frequent visits to the toilet also provoke pressure of the pregnant uterus on the bladder).
Signs of early toxicosis.
Nausea, perversion of taste and smell, intolerance to various odors, salivation - all these phenomena are related to early toxicosis, although they are also possible with a number of other diseases (poisoning, pathology of the digestive tract, infection). Symptoms of early toxicosis are not so often observed before the delay of menstruation, and even after the fact of pregnancy is established, not all women have.