From conception to 12th week of pregnancy. From the moment of the conception, your organism prepares to lodge the fetus. The metabolism adapts to be able to feed it, the hormones cause a kind of tiredness very beneficial for the first months and the breasts begin to prepare for breastfeeding.
These organic changes cause characteristic symptoms that seem from the first days: sleep, fatigue, tension in the breasts.
Dream . The excessive sleep that you will feel during the first months is a resource of the organism that will force you to rest more hours. In this way you will be able to save the energy needed to cope with the enormous effort that the organism is making to manufacture the placenta and adapt to the demands that the fetus will have. You should not fight this tiredness but let your body rest the hours you need.
Need to urinate . The activity of certain hormones often causes the bladder to be emptied even at such an early stage of pregnancy, but the uterus has also increased in size and presses it slightly. In addition, the body fluids have increased and so that no edema occurs and the kidney works faster to eliminate them.
Dizziness and nausea . Its cause is not exactly known. Increased levels of certain hormones may affect the site of the brain where vomiting is regulated and other hormones relax the muscles of the digestive tract.
Tension in the chest . The breasts are more sensitive and begin to grow slightly, the areola around the nipple takes on more pigmentation and can see the blood vessels below the skin.
External changes . The waistline has faded even though the uterus is only the size of an orange. The breasts have rapidly increased in size and the areola of the nipple gets darker and darker. The hormones have ensured that your skin is smoother and hydrated and the hair has more shine and gloss.
Physical changes in the second trimester of pregnancy
13th to 28th week
It is characterized by stability and adaptation and by the disappearance of many of the small discomforts associated with the onset of pregnancy. You may already notice, but slight weight gain does not stop you from leading a normal life.
The belly begins to grow, the nipples can begin to secrete colostrum, the heart beats faster and the different organs are staying with less space because of the growth of the uterus.
Nausea and dizziness disappear during this trimester. The urge to urinate is less frequent. The enlarging uterus moves to the abdominal cavity and pushes the diaphragm several centimeters upwards, but no longer depresses the bladder.
Digestive system . The uterus increases in size by moving the intestines back and to the sides, the stomach moves upwards and, as a result, gastric burning can occur as the gastric secretion is reduced, so that food stays in the stomach longer. Mobility and bowel emptying slow down producing flatulence and constipation.
Bone system . The lumbar curvature increases progressively due to the increase in size and weight of the uterus, which can cause back discomfort. The secret to avoid back pain is to keep it straight and not to bend.
Cardio-respiratory system . As the uterus grows, the diaphragm rises and as a result breathing changes from abdominal to thoracic. The heart also moves a little more up and to the left. It increases the tendency to the formation of varicose veins in the legs produced by the difficulty of returning the veins. The heart beats faster as the volume of blood it pumps increases by almost 40 percent. For this blood to flow without difficulty through the blood vessels, there is a widening that causes the heart to enlarge by a few millimeters.
Physical changes in the third trimester of pregnancy
Week 29 to term
The weight and size of the belly increase considerably, you will be heavier and more tired, so you must find moments during the day to rest.
You can feel isolated uterine contractions, the so-called nesting, because the pelvis begins to widen preparing to let the baby pass.
Hemorrhoids . These varicose veins that appear in the anus zone are aggravated in the last weeks of pregnancy because of the pressure the baby exerts on the area. To avoid its appearance, it is also necessary to avoid constipation. If in spite of these measures hemorrhoids appear, a good measure to relieve the sensation of heaviness and the itch is to apply ice or cold water in them.
Constipation . Peristaltic bowel movements that allow their content to progress decrease in pregnancy. This increases the chances of constipation. In addition, the uterus presses more and more on the rectum which still makes it difficult to eliminate fecal matter. To avoid constipation you have to drink enough fluids, eat vegetables and fruits daily and walk one hour every day. Do not use laxatives without consulting the gynecologist, even natural ones.
Blood pressure . Control your tension since hypertension can be a problem at the end of pregnancy. The main warning signs are: swelling of hands, wrists, ankles, feet and also the face. If this swelling does not go away after night-time rest, see a doctor.
Contractions . During the nine months of pregnancy contractions occur. At first, they are imperceptible, but in the last quarter they are clearly noticeable and may be annoying in recent weeks. However, unlike contractions of labor, they are not painful, nor rhythmic and do not last more than forty or fifty seconds.