Congratulations, you've Officially pregnant. 3 weeks pregnant means one partner's sperm and the egg you've met and you are in the early stages of pregnancy. If the egg is released, there are two and both were successfully fertilized means that you may be pregnant non-identical twins. But you would not know this fact, all of them occurring in the fallopian tubes. When pregnant 3 weeks, you will not feel the effects of pregnancy hormones that will bring changes in your body.
Smelting processes egg and sperm takes 24 hours. Only one sperm that made it into the middle of the egg. At the time of the sperm entered successfully, the egg makes lining guards to protect Themselves so that other sperm can not enter. In the end , the other will give up sperm. If an egg is fertilized by a sperm and then divide, identical twins have formed at this early stage.
Fertilized egg cell is called a zygote and begin splitting into many cells until the third day. Now there are 12 cell number. Zygote still be in the fallopian tubes but Began looking for a way to the uterus, where the zygote will persist for the next 37 weeks. Cilia, hair shakes, the which is the inner lining of the fallopian tubes in order to assist the migration of the zygote does not settle in the wrong place. It takes 60 hours for the fertilized egg to the uterus, at this stage there have been about 60 cells, each of the which has its own duties and functions. Outer cells will form the placenta; cells will form part of the fetus.
About a week after the egg is fertilized in the fallopian tube, the egg will be in the lining of the uterus. Now it is 100 cells collected, the name blastosista. At this point, the hormone human chorionic gonadotrophin hormone is produced and this is detected in the urine or blood when you take a pregnancy test. If the signal to continue producing HCG did not come again, the uterine lining is not needed and will shed the next menstruation.
Now, let's see what happens in Week 4 when the fertilized egg implantation of the Occurs.