Pregnancy – the 1st Trimester

Especially in the first few weeks
and months of pregnancy
many women is bad. Some ask
now that already, as they
next months to survive.

But don’t worry – with-on-progressive development of the babies initial complaints soon recede into the background.

The body turns to

The organs of the embryo are formed in the first trimester. Also develop the head, arms and hands, legs and feet; the nerve cells in the brain form and network. Just in these first three months is the pregnancy at a critical stage. Negative influences such as nicotine, alcohol, medicines or drugs can have great impact on the development of the embryo. Doesn’t show yet the pregnancy the mother, sometimes she doesn’t know yet, that she is pregnant.

Attentive women feel a change in her body, but with certainty they know it only after a test. Signs of pregnancy are: is the period; the morning wake-up temperature (basal body temperature) does not drop, but remains constant; the breasts relax and be sensitive to touch; morning and/or evening nausea can be used. These signs must come not only from a pregnancy.

You do not prevent the possibility of pregnancy, still avoid alcohol and cigarettes and to save themselves, until you are sure to be pregnant – or not just. From the third month, your body changed markedly: your chest is larger; the circulation is stimulated, in the lower abdomen Overtightening can cause, as the uterus grows. Increasing nausea in some women and they must pass up especially in the morning.

Development of the embryo

Because the conception date is rarely exactly sets can be, will be calculated at the medicine from the first day of the last menstrual period. Ovulation and fertilization occur however two weeks later, the first two weeks are only calculating better. Only at the time of ovulation, the egg can be fertilized by a sperm. If egg and sperm fuse, a seedling, the later embryo is created. This moment is the beginning of the pregnancy.

After fertilization, the fertilized egg (Zygote) divides several times; a heap of cells results in a short time. The chromosomes double, arrange themselves in pairs, different apart, which constrict the cell. After 30 hours, two cells have been created within the cell bladder. On the second day of the seedling consists of four on the third day of eight cells. The small seeds in the fallopian tube, from which he is gently pushed towards the womb (uterus) spends the first three days. On the fourth day, penetrating fluid into the Interior of the cell cluster and pushes apart the individual cells (Blastomere) – there is a hollow sphere with different cell information: the a cell mass forms the so called placenta (placenta), which is digging deep into the uterine wall, and which feeds on the embryo during the entire pregnancy. The embryo develops from the other part of the cell mass.

Some cells of the placenta form the pregnancy hormone HCG. This is the ovaries and pituitary gland in the brain that the woman is pregnant and in the next few months, no ovulation to take place has communicated. At the same time causes this signal that the ovary is increasingly progesterone that builds up the lining of the uterus and is so to speak the nest for the embryo.

It takes about six days until the embryo from the fallopian tube to the uterus. When he arrived there, it consists of 70 to 100 cells. Only at the beginning of the fourth week of pregnancy the embryo in the womb settles itself.

From the eighth day of the development of the cells of the layer to three overlapping layers of cells (cotyledons) arrange themselves: first, the external germ layers (ectoderm) and the inner germ layers (endoderm) is created. The formation of an empty space of the ectoderm has formed at the same time, the amniotic cavity. You constantly expands and surrounds the expectant life than inner amniotic sac. From the cotyledon the brain, the spinal cord, the peripheral and central nervous system, sweat glands, tooth enamel and nails develop the ectoderm in the course of time. Mucous membrane and glands arise of the gastro-intestinal tract, of the respiratory tract and the urinary bladder, tonsils and thyroid, liver, and pancreas from the endoderm. The third, Middle cotyledon, the Mesoderm is formed between the ecto – and the endoderm. It is responsible for the striated muscles, cartilage and bones, connective tissue, blood vessels and lymphatic system, heart, spleen and genito urinary system.

During the second week called the blastocyst, which settles at this time in the lining of the uterus at the newly formed life. Also, develop the trophoblast and connect with the maternal blood. There be blood-filled recesses (lacunae), the embryo is nourished. The lining of the uterus takes up the germ and a delicate cuticle, which firmly links it with the lining of the uterus grows the ‘intruder’. This implantation is complete. Every day hundreds of new cells are formed by connection to the maternal blood and the organ system of the fetus is rebuilt.

From about the fifth week the heart activity in the ultrasound can be proven, his heart beats 120-160 times per minute. From the tenth week, the fetus is almost entirely formed by the tiny limbs to heart, brain and face. Up to the twelfth week, all organs are already developing. Tooth roots are formed, the first hair and bones will get slowly harder. Also the ears, eyes and eyelids are already trained. The fetus is now up to 9 cm long and up to 50 g hard.

The course of the mother

As I said, the first third is often uncomfortable for the expectant mother, some women wish to be never conceive it. This is because that is the woman on the needs of the embryo’s body and prepared the birth. The metabolism is changed, this can lead to increased fluid storage and the infamous pregnancy nausea, fatigue and dizziness. Hair and nails grow faster, due to better circulation, it can easily to gums
bleed come.

In order to create enough space to the child, make hormones make sure that ligaments and muscles will stretch. Hormonally related hair loss may include the effects of this phase of pregnancy. Apart from healthy eating and good scalp care not much, however, can do. Usually, the hair loss subsides after a few weeks back.

Because the growing uterus presses slowly on the urinary bladder, already increased urination may occur (this is a major disease in the third trimester for many women. Also the genital organs are more irrigated, which can lead to the increased secretion and vaginal discharge. During this time, use no tampons against the discharge but panty liners or bind should be replaced several times a day.

In the first trimester women gaining on average one to three kilos weight. Is often bad and need to be passed, it may also be that you take off in this first time. If you lose much weight, talk to your gynecologist! Because right at this moment, your body needs a number of feeder
substances. Pregnancy increases the need for your body to vitamins, iron, iodine, magnesium, calcium and especially folic acid. Folic acid (contained in vegetables, fruits and grains) is important for all Zellteilungs – and growth processes. A deficiency can include anemia, indigestion, and mucosa-
result in changes in the mother. For the unborn, he can disrupt the development of the central nervous system, the brain and spinal cord (neural tube defects).

The development of the baby in the 1st trimester

Please click on the pictures to see how the baby over the course of three months
developed the first trimester:
You quickly find many terms of pregnancy explained in our Glossary.