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You will not know your first week of pregnancy. The first week of pregnancy, you are not technically even pregnant yet. This is the week of your last menstrual period.

2nd week-The second week of pregnancy is when the sperm from the male fertilizes your egg that is released during ovulation.

3 weeks- At three weeks pregnant, you most likely don't even know that you are pregnant. All that is present is about 500 microscopic cells. The cells haven't formed an embryo or fetus yet. This is when the zygote (the microscopic cells that aren't yet formed into an embryo/fetus) implants itself into your uterine lining.

4 Weeks-Well at four weeks pregnant, the embryo has just now implanted itself. The fetus has not yet developed any limbs or any obvious features yet. It is about 1/25" and weighs less than one gram. This is probably the week you will find out you are pregnant. This week the placenta is being created, as well as the umbilical cord and the baby is now working on developing actual features. The embryo is now made of three layers that will develop into functioning organs.

5 weeks- There have been some HUGE changes from week 3 to week 5! Congratulations, your fetus is starting to actually look like a fetus! It now is beginning to develop little stubby limbs and a little head. It is about 2 millimeters and still weighs less than one gram (about the size of a poppy seed). This is the week your baby will develop its heart beat which will in turn means your baby also has blood circulation and it's first functioning organ! The placenta and umbilical cord are still developing at this point. Also at this week the beginning of the brain, cardiovascular system, nervous system and reproductive system are in the making!

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15y ago
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14y ago

No, you can suspect it but there is no way to be certain. It takes 6 days for an egg to implant in the uterus and it is only then that you will start to produce hcg and there will not be enough for any urine test to pick up. I would doubt very much that any doctor would do a blood test this early into a suspected pregnancy. If you think you are pregnant wait till your period is late to test.

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15y ago

Surprisingly enough, doctors consider the first week of pregnancy to be the week of your period even though you are not technically pregnant yet.

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12y ago

The first trimester begins from the moment you conceive until aout 12 or 13 weeks.

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15y ago

Its mostly pelvic cramps

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12y ago

There is none at 1 week.

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11y ago

From first week to 12 weeks.

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16y ago

No symptoms

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12y ago

09-29-11

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Q: When is the first week of pregnancy?
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Are there any symptoms of pregnancy in the first week?

No it is far to early to say anything about pregnancy in the first week.


Can you have pregnancy symptoms in the first week like just little signs?

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Every pregnancy is different. Most women feel no different at all in the first week. Some have problems such as Kate Middleton.


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In the FIRST week? Probably not. However, every woman reacts a little differently to pregnancy, and every pregnancy is different.


What do you experience during the first week of your pregnancy?

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