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Third Week of Pregnancy (3 week three pregnancy)

Last week, the fertilized egg has divided into hundreds of cells and is now called a blastocyst. The blastocyst is hollow and filled with fluid, if now he could see inside your uterus, would hardly be visible.

Around the third week (usually between 4 and 7), the blastocyst is implanted in the endometrium, the lining of the uterus. Implantation in the uterus is an essential connection, the endometrium will provide nutrients to the developing embryo and eliminate waste. Over time, this implantation site will become the placenta. During pregnancy, the placenta nourishes and protects your developing baby.

already spent a week after fertilization. The blastocyst begins to secrete hormones that prevent your body from releasing the endometrial tissue in the uterus, so you may see that you had your period.

Adequate intake of vitamins, especially folic acid, protein, calcium and iron is essential for nourishing your baby. A folic acid supplement, which, ideally, will have been taking since before conception is particularly important because folic acid helps prevent neural tube defects (head, vertebral column and related structures) formed very early in pregnancy. If not consumed folic acid before please do not be alarmed, consult your doctor who will reset you some extra insurance.

protein intake, which is used to create new tissue, should be doubled during pregnancy should eat at least 60 grams per day. In addition, calcium is needed, at least 1,200 milligrams, for the development of bones and teeth, so be sure to eat a good amount of dairy products, leafy green vegetables. Iron is essential during pregnancy and supporting the continued growth of your baby's blood volume.

Below some anatomy the third week of pregnancy:
invagination of ectodermal cells continues and begin to migrate into the lamina procordal, forming a tube-like extension, called a notochord extension (precursor of the intervertebral discs). In the trilaminar disc flow will form the cloacal membrane (precursor of the year). In addition, they form a small tube, called a duct neuroentérico.

The embryonic disk, which is the initial stage is flat and round, gradually becomes longer and longer for the eighteenth day has a broad head end a narrow caudal end. At this stage, growth occurs mainly embryonic disc in the head region.

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Second Week pregnancy (2 week two pregnancy)

His second week of pregnancy your body is now very busy. Your uterus is preparing for the arrival of their baby. During the second week, their estrogen aunmenta at this time sending a message to your uterus to prepare for a future pregnancy. Your uterus will form a lining which is rich in blood for the egg to implant and start growing the placenta to nourish your baby.

Increased levels of progesterone prepare the uterus to support a fertilized egg. While all this happens, the ovaries begin to mature eggs in fluid-filled sacs called follicles. During this time you may notice when you are ovulating, you can feel the stitches in the side of his abdomen. Normally this is an indicator of ovulation, with the tenderness of their breasts. When the eggs are ready for fertilization, they are released from the follicles to begin your day in the fallopian tubes where they can meet the sperm of her dreams.

The sperm must be able to travel up through your reproductive tract, through your cervical mucus in the uterus, and through her fallopian tubes to reach the egg. Sperm must be able to complete the time within forty-eight hours or sperm will no longer be viable. If this does not happen and their eggs are fertilized during this time your uterus will begin to convert the monthly bleeding. As a result you start to menstruate and the cycle begins again.

"Pink or blue? The sex of your baby is determined at the time of fertilization, which occurs at the end of the week. Of the 46 chromosomes that make up your baby's genetic material, two chromosomes, one sperm and one egg, determine the sex of the baby. Each egg has an X chromosome sperm may have an X chromosome or a Y chromosome If the sperm has a X chromosome, have a child, if the sperm has a Y chromosome, your baby will be male.

While your baby was conceived, and is working a lot. The fertilized egg goes a process of division. Thirty hours after fertilization, divides into two cells, then four, then eight and continues to divide as you travel from the fallopian tubes to the uterus.
When it reaches the uterus, this group of cells and reaches 32 and is called a morula. One week after fertilization, there are 250 cells.