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You are 4 weeks pregnant.

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By the end of this week, you will most likely be expecting your period to come. However, if you are pregnant your period will most likely not come. Some women do experience some spotting or even a light period. It is also possible to have your period and still be pregnant! If you do miss your period, you might begin to think about a possible pregnancy! Home pregnancy tests are not as reliable as blood tests at this point. A blood test will detect a positive pregnancy test at this point because the hormone, human Chorionic Gonadotropin (hCG), has been secreted.

At this point in your pregnancy, your growing baby is very small and is about 1 mm in length. One mm is about half of the size of a typed letter `o`. You are still not showing at all and you have not yet gained any weight. Even though you are in the very early stages of your pregnancy, many great changes are occurring. The implanted embryo is embedded deeper in the lining of your uterus and the amniotic cavity is beginning to form. The placenta is also forming and will be delivering oxygen and nutrients to your developing baby. This week the blastocyst begins to transform into an embryo. The embryo will have three different layers with different types of tissue. The inner layer will form the lungs, liver, digestive system and pancreas. The middle layer will become the skeleton, muscles, kidneys, blood vessels and heart. The outer layer will become the skin, hair, lenses of eyes, tooth enamel and the nervous system.

A clear result. If you tried it a few days ago and the result wasn't as convincing as in this picture, try it again now to be sure!

Even though you have not yet gained any weight, you need to be prepared to gain weight during pregnancy. Gaining a healthy amount of weight is crucial for the health of both mother and baby during pregnancy. You can control your weight gain by eating healthy and nutritious meals and snacks. During pregnancy you are eating for two, but that does not mean you have to eat twice as much!

Your body now starts producing a hormone which stops you having your period, and it shows in your urine.

It is now possible for your pregnancy to show up on blood tests, and even home pregnancy tests.

About 1 in 3 women have a light bleeding at this point. This happens before you would expect your period to arrive. Unless accompanied by cramping, backache or increased bleeding, a small amount of blood being discharged should be considered as implantation bleeding which is nothing to be concerned about.

At this point, your baby is still not visible to the naked eye.

See also:
Ovulation Calendar (When can you do a home pregnancy test?)
Home pregnancy tests

Comments on week 4

Comments 1-17 of about 17 from week 4
1 messages have been added in the last 24 hours.

Show latest comments from all weeks

TinaMumof3 - 2 days ago
Aw so sorry to hear that!! I have also had 3 miscarriages in the past but also now have 3 sons, I'm in week 5 now and my husband was not happy either as he did not want anymore children but he has come round to the idea now :) fingers crossed for you next time hun. Hope you are ok xx

G7 - 4 days ago
oh falsterbo, I am so sorry and I am so sorry you have to go through it alone. I had 5 (late first trimester MC's) before my rainbow son and I know it is just devastating. I will be thinking of you and please still post if you need to vent. (I'm in week 10) I'll see on Monday if we still have a heartbeat but I won't feel out of the woods until week 14 -ugh it is so hard. Stay strong!

falsterbo - 4 days ago
I never actually told him and as of today i am going through a MC :(. This is the 3rd MC in a row for me....

G7 - 5 days ago
Falsterbo, the discharge is normal and you don't need to freakout unless it comes with cramping. Stuff is changing and stretching down there so it will give off some discharge. But I totally understand the freaking out especially after losses. Good luck. Also if you edit your profile page and change your due date it will then list you on the side of the page under 'members in week 4'. BTW how did your DH handle to news?

falsterbo - 8 days ago
I am here Tina! This is my 4th time here. I have a son who is 5 and have had 3MC. I just took a test this morning as i am 4 days or so late and it was positive. Sigh I don't know how to tell my husband. I had an IUD but it made my periods so bad so I removed it. I never told him but was being sorta careful. I had sex 1 week before expected ovulation! He does NOT want another child. I wish he did tho cause i do!

TinaMumof3 - 10 days ago
Hi, is there anyone else in here at the moment?? xxx

kirbyann - 24 days ago
Hi every one. I am pregnant with baby #6. I was in a long term relationship but this morning (day after we found out) he left me. I am sad and feel alone but more sad that I am pregnant and alone. I know by the end of this I will be so grateful for another child, no matter how difficult life is, but right now I just feel cheated. :( Congratulations to all you who tried and were successful or are just elated with the surprise. Having been through it 5 times before I can tell you it is always a special time. :)

sweetbabyboy - 27 days ago
Hi Ladies!!! Congrats to you all!!! I got my Bfp today!!! Line was faint but a line is a line!!!! This will be baby #4 for us, can't wait!!!!!

Mz. Tye Baby - 39 days ago
Hi G7, No I have two girls, 7 and 3 years old. My due date is June 20th.

G7 - 40 days ago
welcome MZ.Tye baby! Is this your first? when is your due date?

Mz. Tye baby - 40 days ago
Hi Larisa929, Thank you and congrats to you. Yea!!!!!!!!!

larisa929 - 40 days ago
Hi Mz Tye Baby! Welcome and congrats!

larisa929 - 40 days ago
When I had miscarried 2 years ago I was supposed to be 8 weeks but when I went for the sono the baby only measured 6 with a slow heartbeat. After that sono I miscarried 2 days later. They didn't know anything was wrong when I went for the sono, they had just said I must have ovulated late and the baby was just starting to form but I knew something was wrong. I was on strong medication at the time bc I have ulcerative colitis so I'm attributing it to that. I'm praying this time everything goes smoothly. I decided to take another pregnancy test today to see if the lines would come up darker and they did! Haha. Hope your shift at work went well today. :)

Mz. Tye baby - 40 days ago
Hi Everyone, I received two positive hpt taken two day apart within 30 seconds of the test time. The pregnant line was darker than the test line. Hope to make new friends this time around.

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Members in week 4:

    The due date from members in week 4 is from Wednesday 27 July 2016 up to & including Tuesday 2 August 2016. See the full timeline here

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    This list is updated twice a day. The list shows members who were online within the last 14 days at the time it was generated. It may take up to 12 hours before you see your name after you've made changes to your due date or if you haven't been online for 14 days or more.