Maternal physiological changes in pregnancy are the adaptations during pregnancy that a woman's body undergoes to accommodate the growing embryo or fetus. These physiologic changes are entirely normal, and include behavioral brain , cardiovascular heart and blood vessel , hematologic blood , metabolic , renal kidney , posture, and respiratory breathing changes. Increases in blood sugar, breathing, and cardiac output are all expected changes that allow a pregnant woman's body to facilitate the proper growth and development of the embryo or fetus during the pregnancy. The pregnant woman and the placenta also produce many other hormones that have a broad range of effects during the pregnancy. Pregnant women experience numerous adjustments in their endocrine system that help support the developing fetus.
This information provides a general overview and may not apply to everyone. By week 17, the top of your uterus should be halfway between your pubic bone and navel. Near the middle of your second Sex expanstion pregnant, you may begin to feel the baby. Make sure you wear sunscreen when spending time outside. English English French. Changes are caused by steroid hormones, lactogen, and cortisol.
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The second trimester is often defined as weeks 13 through
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A few things determine when your belly bump will become noticeable and how large it will be. First-time mothers can expect to see a noticeable belly expansion between 12 and 16 weeks. Your pregnancy symptoms may include bloating, causing your pants to feel tighter even before 12 weeks. Mothers who have been pregnant before tend to show earlier, because their abdominal wall has already been stretched from the prior pregnancy.
First-time mothers can expect to see a noticeable belly expansion between 12 and 16 weeks, and mothers who have been pregnant before tend to show earlier. The bump is the growth of the baby above the pelvic bone. While most people know about stretch marks, other side effects of a rapidly expanding belly during pregnancy may be unexpected, especially for first-time parents. Women experience several side effects as their belly grows during pregnancy, and most are completely normal. Stretch marks occur as the skin on your belly grows rapidly to accommodate the growing baby.
These show up as red or pink streaks across your tummy. Your breasts may also grow during pregnancy. Depending on how large your belly grows, your personal experience with stretch marks may vary. You can try to minimize the appearance of stretch marks by maintaining a healthy diet during pregnancy. Drinking plenty of water and moisturizing regularly may also help. During the second trimester, some women begin to see a dark line running down the center of their belly or see their innie belly button become an outie.
The dark line down your belly is called the linea nigra. It stretches from your belly button to your pubic area and darkens because of changing hormones during pregnancy.
This is usually a result of your belly expanding and your umbilical tube stump being pushed out. Every pregnancy is different, so not every woman experiences these effects. Some women may even experience them with one pregnancy and not another.
Having extra weight in your belly can cause back pain. As your center of gravity shifts, your lower-back muscles have to work harder, potentially causing chronic soreness. Back pain is typically most common in the third trimester, when your belly is the largest. Try taking a warm bath, applying warm compresses, or sleeping on your side to ease back pain.
As your baby grows, your uterus expands into your abdominal cavity, pushing your internal organs farther up underneath your rib cage. As the space in your abdomen decreases, it can be harder for your lungs to fully expand. It may be more comfortable to sit in a reclinable chair during the later part of your pregnancy.
Although a growing belly is a natural part of pregnancy, seeing your body change can be an emotional roller coaster for many women. Many women worry that they will not regain their pre-pregnancy bodies. Hormones can also cause your mood to shift rapidly.
You might go from feeling excited about your growing belly bump one day to feeling large, bloated, and uncomfortable the next. Some women worry about feeling negative about how they look with a swollen belly.
This is very normal and nothing to be ashamed of. There may be other causes for rapid belly expansion that are normal during pregnancy. There may also be causes for a swollen belly that have nothing to do with expectant motherhood.
Your due date is measured by adding days starting from the first day of your last period. Some women have irregular periods, though, which can throw off the due date estimate. This may make it seem like your bump is showing earlier or later than you expect. Doctors generally agree that healthy pregnant women can expect to gain between 25 and 35 pounds during pregnancy. A lot of that weight gain will happen during the last trimester, as the baby grows more quickly.
Women who gain excess weight during pregnancy may have a larger, more protruding belly. Women who were overweight or obese before conceiving may also have a larger belly. Second pregnancies and those that come after typically cause pregnancy bumps to be more noticeable earlier on. This is because the abdominal muscles have been stretched from the first pregnancy. Mothers of multiples will often have a larger belly than women with just one fetus.
After all, more babies take up more space! For mothers of multiples, the side effects of a growing belly will often be exacerbated. These can include stretch marks, lower back pain, and difficulty breathing. Changes in your gastro-intestinal tract are normal with pregnancy. Excessive gas and bloating are common, especially in the first trimester. Pregnant women may also experience constipation.
This is because of hormones that relax the intestinal muscle and the pressure of the expanding uterus on the intestines. A relaxed intestinal muscle causes food and waste to move more slowly through your system. Pregnancy vitamins with iron may also contribute to constipation. In most cases, a swollen belly during pregnancy is completely normal and healthy. However, there are some pregnancy conditions that can cause a rapidly swelling belly and need to be more carefully monitored. If you experience any of these conditions, make sure to talk to a medical professional.
A larger-than-average fetus will likely cause a larger-than-average belly bump. Women who have a larger baby may need special delivery accommodations , which should be discussed with your doctor as early as possible.
Molar pregnancies result from problems during fertilization, causing an abnormal placenta. If you have a complete molar pregnancy, that means the sperm fertilized a non-viable egg and the placental tissue has grown very quickly.
Most molar pregnancies result in miscarriage. This term refers to an excessive amount of amniotic fluid in the uterus. This can lead to preterm labor and contractions. This condition should be closely monitored by your ob-gyn.
Large ovarian tumors can be spotted during routine ultrasounds during pregnancy. Your specific treatment will be determined by what your physician finds. These occur when muscle cell fibers quickly come together into masses within the uterine wall. These tumors cause abdominal swelling, pain, and difficulty urinating, all of which are similar to pregnancy symptoms.
It takes time for your uterus to go back to its normal size, though. As your belly shrinks, you may feel cramping and soreness. Generally, the amount of weight you gained during pregnancy, how active you are, and your genes all affect how quickly your belly returns to its normal size.
Women who have had a C-section may experience swelling around the incision site. Scar tissue can also cause additional swelling. Women who gained excess weight during pregnancy may have prolonged belly swelling. Your belly will grow and swell throughout your pregnancy. In addition to your growing baby, there may be other factors that contribute to a swollen belly. When does the belly bump start to show up? What may belly expansion entail?
Stretch marks Stretch marks occur as the skin on your belly grows rapidly to accommodate the growing baby. Dark belly line and outie belly button During the second trimester, some women begin to see a dark line running down the center of their belly or see their innie belly button become an outie. Back pain Having extra weight in your belly can cause back pain. Difficulty breathing As your baby grows, your uterus expands into your abdominal cavity, pushing your internal organs farther up underneath your rib cage.
Poor body image Although a growing belly is a natural part of pregnancy, seeing your body change can be an emotional roller coaster for many women. Rapid belly expansion: why it may occur. Incorrect dates Your due date is measured by adding days starting from the first day of your last period.
Pre-pregnancy obesity and big pregnancy weight gain Doctors generally agree that healthy pregnant women can expect to gain between 25 and 35 pounds during pregnancy.
Second pregnancy. More than one baby Mothers of multiples will often have a larger belly than women with just one fetus. Gassiness and pregnancy bloat Changes in your gastro-intestinal tract are normal with pregnancy. Abnormal causes of belly expansion In most cases, a swollen belly during pregnancy is completely normal and healthy.
Larger fetus A larger-than-average fetus will likely cause a larger-than-average belly bump. Molar pregnancy Molar pregnancies result from problems during fertilization, causing an abnormal placenta. Polyhydramnios This term refers to an excessive amount of amniotic fluid in the uterus.
Large ovarian tumor Large ovarian tumors can be spotted during routine ultrasounds during pregnancy. Fast-growing benign fibroid tumors These occur when muscle cell fibers quickly come together into masses within the uterine wall.
How long does it take a belly to disappear after giving birth? Updated August 12, Video Courses by Flo.
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Pregnancy: The fourth month
Dilation is a term that describes the widening of the cervical opening. Dilation of the cervix is one sign that a pregnant woman is going into labor. During the final stages of pregnancy, doctors perform cervical exams to track the progress of the pregnancy and the extent of dilation of the cervix. In the first stage of labor, the cervix will dilate to 10 centimeters cm in width. Dilation is typically gradual, but the cervix can widen rapidly over 1 or 2 days. A few different factors can influence how quickly dilation occurs.
Walking around the room, doing simple movements in bed or chair, or even changing positions may encourage dilation. Sitting on the ball and rocking back and forth or moving in circles can help keep the muscles in the pelvis loose and relaxed for delivery. It is easy to become tense during the last stages of pregnancy, but learning to relax can have a range of benefits. Stress and muscle tension and can delay labor by making it harder for the cervix to dilate.
These issues can also keep the baby from descending. Many women benefit from practicing breathing exercises or meditation before and during labor. Even dimming the lights can help. Laughing can keep stress and fear at bay. Even momentary relief can relax the body and aid dilation. Joking around, or watching funny movies or stand-up comedy may help to keep spirits up before and during labor. Expert, evidence-based advice delivered straight to your inbox to help you take control of your health.
A doctor may apply a medication that contains prostaglandin to soften the cervix and promote dilation. A process called membrane stripping may help. It involves a doctor or midwife rubbing their fingers against the membranes of the amniotic sac to release prostaglandin into the uterus and help the cervix dilate. Women interested in unmedicated or "natural" birth may avoid medical intervention until it is necessary.
In the first phase, the cervix dilates to 3 cm. The baby drops lower into the pelvis, and this increases the levels of prostaglandin in the body, which stimulates dilation.
Capillaries in the cervix can rupture during this stage and cause bloody discharge known as the bloody show. This is normal. The next phase is active labor, when the cervix will dilate further. Some doctors mark the end of this phase when the width of the cervix reaches 7 cm. Others use contractions as a guideline. The final step in this stage, called the transition phase, lasts until the cervix dilates to 10 cm.
The second stage of labor begins when the cervix dilates to 10 cm and ends with delivery. The length of time can vary from woman to woman, and a variety of factors influence it. However, there are a number of natural ways to promote dilation before and during labor. It is often a good idea to find ways to relax. Table of contents How to dilate faster Tips to speed up dilation The stages of labor Takeaway.
Using an exercise ball may help to speed up dilation. Stay in the know. Expert, evidence-based advice delivered straight to your inbox to help you take control of your health Sign Up. Medical intervention may be necessary during labor. Cervical dilation through the stages of labor. The stages of labor are very distinct, and a cervix dilation chart can help to clarify the process. Find a chart and more information here. There are three distinct stages of labor.