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Hormonal Changes During Trimester

By Author: Healthpulls
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From the time you get pregnant to the time when you finally deliver the baby your hormones keep changing and have a roller coaster ride. When you have a baby in the few first weeks of pregnancy you are almost always nauseous, you suffer through major anxiety and serious mood swings. Your hormones literally take a toll on you because your hormones work to make a new human being inside of you. Now we will discuss the hormonal changes during each trimester.

• Hormonal changes during first trimester:
The first trimester is mostly doozy for the women. Her body actually goes into overdrive to create the little embryo. Blood volume rapidly increases, immune system changes itself to keep the fetus safe and blood stream is running with a whack of hormones. When the women first becomes pregnant, there are to major hormones that take part, estrogen and progesterone, these hormones are a part of our menstrual cycle, it rises dramatically and a hormone special to pregnancy known as human chorionic gonadotropin, starts producing. Progesterone is the most important in getting pregnant because it actually prepares uterus lining for egg to implant and when you get 8 weeks pregnant symptoms and feel things like back pain it also works as a muscle relaxant and prevents uterus from contraction until the start of labor. But these muscle relaxant properties also cause constipation, as it slows the digestive tract down. Progesterone is associated with irritability in premenstrual period. Because progesterone level are elevated during pregnancy, side effects like mood swings can occur. In the meantime estrogen regulates progesterone and also maintains the endometrial lining which is important for the development of baby. Estrogen promotes an increase in the blood flow, which helps in the nourishment of the baby but this extra blood flow has side effects like achy breasts etc. This blood flow also increases the pressure on you bladder which will make you go to the washroom more often.

Human chorionic gonadotropin is called as the pregnancy hormone because it is usually only produced during pregnancy. When you are pregnant the level of your human chorionic gonadotropin will rapidly rise, doubling after every few days until they reach their peak in first 8 to 11 weeks. This hormone is significant because it shows that the placenta is starting to create, it also makes you nauseous. For the morning sickness during pregnancy there is no specific reason but human chorionic gonadotropin is usually the culprit. If you are pregnant with twins or triplets, you might experience more nausea because human chorionic gonadotropin is more produced. You may have increased sense of smell which could be due to increased level of human chorionic gonadotropin.

You might also think your thyroid has nothing to do with pregnancy but when you expect a baby there is a rapid change in these hormones as well. It helps regulate the metabolism in your body. They are also important in the neurodevelopment of your baby.

• Hormonal changes during second trimester:
The second trimester is known as the best one because at week 13 women start to feel like a normal human being again, nausea usually ends in this trimester but there are some other changes that a women notice. Your muscles and joints start feeling strange and uncomfortable especially around pelvis. This is because of the relaxin hormone that relaxes the smooth muscles in pelvis and promotes growth of placenta. It can cause some pains and aches in ligaments or even serious injuries easily. In the second trimester estrogen and progesterone keep increasing to help the baby grow. But these hormone stimulate the melanocyte-stimulating hormone. It triggers skin’s melanocytes cells to produce the melanin; the skin darkening enzyme. It is also known as melisma which makes brown and grey patches on your face. There also appears a line from your belly to upward known as linea nigra. But is usually ends postpartum. At this stage your hair also start growing rapidly. And it is all because of the hormones surging. Cortisol increases during pregnancy, it is usually called as a stress hormone but it is not really that bad. It plays an important role in the development of fetus because it regulates your metabolism and controls blood sugar level. If the levels of cortisol high then it can also cause side effects like stretch marks, blood pressure problems and redness to your face.

A hormone called human placental lactogen plays a great role in helping the baby grow. It is also one of the important hormones connected to insulin resistance during the pregnancy period.

• Hormonal changes during third trimester:
Your baby starts to increase the pounds during this trimester and your body starts producing hormones that are needed postpartum. There is a peak in the estrogen and progesterone during the week 32 and the estrogen levels in your body are the highest as compared to other time of this trimester. Probably six times more than before pregnancy. In this trimester you starts noticing that there is a lot of swelling on different parts of your body like your ankles, hands etc. While this can be associated to your lymphatic system, estrogen might also play a role because it is somehow involved in the synthesis of a hormone related to the retention of salt and water. During the later stage of pregnancy women may also feel heartburn or acid reflux because progesterone relaxed sphincter on the base if esophagus, which allows food and acid of stomach to travel back upwards. Meanwhile, the relaxin hormone helps to loosen pelvis muscles to near of pregnancy to be prepared for the delivery.

Prolactin, a hormone which stimulates the breast tissue development for lactation, increases in third trimester. Prolactin is almost 10 times increased at the end than it is at the beginning of pregnancy. Nobody really knows what triggers the labor but it is thought to be due to the increase of hormone called oxytocin and a sudden drop in pregnancy. It also starts contractions that your body needs to remove the placenta after birth.

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