Saturday, May 28, 2011

Pregnancy

Signs of Pregnancy

The signs of pregnancy are easy to recognize, particularly if this is not your first pregnancy. No matter how many times you get pregnant, the signs of pregnancy are the same. Thinking you might be pregnant and wondering what the most common signs of pregnancy are. Examine the symptoms to your heart's content, but remember your doctor is the only one who can confirm pregnancy.  Common Signs of Pregnancy :


1.    No menstrual period

Although this is not proof positive, absence of your menstrual cycle is a good indicator of pregnancy.


2.      Fatigue and sleepiness

For many women, fatigue is the first symptom & signs of pregnancy.


3.      Breast changes

Along with fatigue, breast changes are possibly the earliest sign of pregnancy. Breast changes include fullness, tenderness, sensitivity to touch, change in size, and darkening of the areola.


4.      Nausea and vomiting

Nausea and vomiting, also known as morning sickness, is another signs of pregnancy. Not all women experience morning sickness and morning sickness may not occur until two to four weeks after a missed period. Generally, morning sickness resolves or improves in the second trimester.


5.      Frequent urination

Once you become pregnant, your blood volume increases and your kidneys increase in size.


6.      Fullness, bloating, achiness in the abdominal area
Believe it or not for many women the symptoms & signs of pregnancy mimic the symptoms of PMS. If you are experiencing PMS symptoms, don't rule out the possibility of pregnancy. Some women will also complain of diarrhea or constipation in pregnancy


7.      Mood swings and irritability

Hormonal changes combined with fatigue may cause mood swings and irritability. If you find yourself incredibly crabby this could be a signs of pregnancy.

Other common signs of pregnancy include an increase in vaginal secretions, aversion to certain foods or smells, weight gain, and constipation.



Less common signs of pregnancy : 


1.      Implantation bleeding

An estimated twenty percent of women will experience bleeding when the fertilized egg implants into the uterus

2.      Headaches

For women that suffer from headaches, pregnancy usually decreases the frequency of headaches.





Pregnancy Periods


Pregnancy is typically broken into three periods, or trimesters, each of about three month. While there are no hard and fast rules, these distinctions are useful in describing the changes that take place over time.


First trimester

Traditionally, doctors have measured pregnancy from a number of convenient points, including the day of last menstruation, ovulation, fertilization, implantation and chemical detection. In medicine, pregnancy is often defined as beginning when the developing embryo becomes implanted into the endometrial lining of a woman's uterus. In some cases where complications may have arisen, the fertilized egg might implant itself in the fallopian tubes, the cervix, the ovary or in the abdomen, causing an ectopic pregnancy. In the case of an ectopic pregnancy, there is no way for the pregnancy to progress normally. If left untreated, it can cause harm and possibly death for the mother when a rupture occurs. Sometimes it will go away on its own, but otherwise a surgical procedure or medicine is given to remove the tubal pregnancy, since there is no way of the pregnancy being able to continue safely. Most pregnant women do not have any specific signs or symptoms of implantation, although it is not uncommon to experience minimal bleeding at implantation. Some women will also experience cramping during their first trimester. This is usually of no concern, unless there is spotting or bleeding as well. After implantation, the uterine endometrium is called the decidua. The placenta, which is formed partly from the decidua and partly from outer layers of the embryo, connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange via the mother's blood supply. The umbilical cord is the connecting cord from the embryo or fetus to the placenta. The developing embryo undergoes tremendous growth and changes during the process of fetal development.

Morning sickness occurs in about seventy percent of all pregnant women, and typically improves after the first trimester. Although described as "morning sickness", women can experience this nausea during afternoon, evening, and throughout the entire day.

In the first 12 weeks of pregnancy, the nipples and areolas darken due to a temporary increase in hormones.

The first 12 weeks of pregnancy are considered to make up the first trimester. The first two weeks from the first trimester are calculated as the first two weeks of pregnancy even though the pregnancy does not actually exist. These two weeks are the two weeks before conception and include the woman's last period.

The third week is the week in which fertilization occurs and the 4th week is the period when implantation takes place. In the 4th week, the fecundated egg reaches the uterus and burrows into its wall which provides it with the nutrients it needs. At this point, the zygote becomes a blastocyst and the placenta starts to form. Moreover, most of the pregnancy tests may detect a pregnancy beginning with this week.

The 5th week marks the start of the embryonic period. This is when the baby's brain, spinal cord, heart and other organs begin to form. At this point the embryo is made up of three layers, of which the top one (called the ectoderm) will give rise to the baby's outermost layer of skin, central and peripheral nervous systems, eyes, inner ear, and many connective tissues. The heart and the beginning of the circulatory system as well as the bones, muscles and kidneys are made up from the mesoderm (the middle layer). The inner layer of the embryo will serve as the starting point for the development of the baby's lungs, intestine and bladder. This layer is referred to as the endoderm. A baby at 5 weeks is normally between 116 and 18 inch (1.6 and 3.2 mm) in length.

In the 6th week, the baby will be developing basic facial features and its arms and legs start to grow. At this point, the embryo is usually no longer than 16 to 14 inch (4.2 to 6.3 mm). In the following week, the brain, face and arms and legs quickly develop. In the 8th week, the baby starts moving and in the next 3 weeks, the baby's toes, neck and genitals develop as well. According to the American Pregnancy Association, by the end of the first trimester, the fetus will be about 3 inches (76 mm) long and will weigh approximately 1 ounce (28 g).


Second trimester

Weeks 13 to 28 of the pregnancy are called the second trimester. Most women feel more energized in this period, and begin to put on weight as the symptoms of morning sickness subside and eventually fade away.

In the 20th week, the uterus, the muscular organ that holds the developing fetus, can expand up to 20 times its normal size during pregnancy. Although the fetus begins to move and takes a recognizable human shape during the first trimester, it is not until the second trimester that movement of the fetus, often referred to as "quickening", can be felt. This typically happens in the fourth month, more specifically in the 20th to 21st week, or by the 19th week if the woman has been pregnant before. However, it is not uncommon for some women not to feel the fetus move until much later. The placenta fully functions at this time and the fetus makes insulin and urinates. The reproductive organs distinguish the fetus as male or female.


Third trimester

Final weight gain takes place, which is the most weight gain throughout the pregnancy. The fetus will be growing the most rapidly during this stage, gaining up to 28 g per day. The woman's belly will transform in shape as the belly drops due to the fetus turning in a downward position ready for birth. During the second trimester, the woman's belly would have been very upright, whereas in the third trimester it will drop down quite low, and the woman will be able to lift her belly up and down. The fetus begins to move regularly, and is felt by the woman. Fetal movement can become quite strong and be disruptive to the woman. The woman's navel will sometimes become convex, "popping" out, due to her expanding abdomen. This period of her pregnancy can be uncomfortable, causing symptoms like weak bladder control and backache. Movement of the fetus becomes stronger and more frequent and via improved brain, eye, and muscle function the fetus is prepared for ex utero viability. The woman can feel the fetus "rolling" and it may cause pain or discomfort when it is near the woman's ribs and spine.

There is head engagement in the third trimester, that is, the fetal head descends into the pelvic cavity so that only a small part (or none) of it can be felt abdominally. The perenium and cervix are further flattened and the head may be felt vaginally. Head engagement is known colloquially as the baby drop, and in natural medicine as the lightening because of the release of pressure on the upper abdomen and renewed ease in breathing. However, it severely reduces bladder capacity, increases pressure on the pelvic floor and the rectum, and the mother may experience the perpetual sensation that the fetus will "fall out" at any moment.






Sexual activity during pregnancy


Most pregnant women can enjoy sexual activity during pregnancy throughout gravidity. Most research suggests that, during pregnancy, both sexual desire and frequency of sexual relations decrease. In context of this overall decrease in desire, some studies indicate a second-trimester increase, preceding a decrease. However, these decreases are not universal: a significant number of women report greater sexual satisfaction throughout their pregnancies.