Week 3 of Pregnancy
Choose Your Week
- Your 1st Week
- Week 2 of Pregnancy
- Week 3 of Pregnancy
- Week 4 of Pregnancy
- Week 5 of Pregnancy
- Week 6 of Pregnancy
- Week 7 of Pregnancy
- Week 8 of Pregnancy
- Week 9 of Pregnancy
- Week 10 of Pregnancy
- Week 11 of Pregnancy
- Week 12 of Pregnancy
- Week 13 of Pregnancy
- Week 14 of Pregnancy
- Week 15 of Pregnancy
- Week 16 of Pregnancy
- Week 17 of Pregnancy
- Week 18 of Pregnancy
- Week 19 of Pregnancy
- Week 20 of Pregnancy
- Week 21 of Pregnancy
- Week 22 of Pregnancy
- Week 23 of Pregnancy
- Week 24 of Pregnancy
- Week 25 of Pregnancy
- Week 26 of Pregnancy
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- Week 28 of Pregnancy
- Week 29 of Pregnancy
- Week 30 of Pregnancy
- Week 31 of Pregnancy
- Week 32 of Pregnancy
- Week 33 of Pregnancy
- Week 34 of Pregnancy
- Week 35 of Pregnancy
- Week 36 of Pregnancy
- Week 37 of Pregnancy
- Week 38 of Pregnancy
- Week 39 of Pregnancy
- Week 40 of Pregnancy
Fertilization
4. Cells surrounding the egg secrete chemicals that aid egg development.
3. The whiplike tail of the sperm propels it up the fallopian tube to meet the egg.
2. The sperm's head carries genetic material along with enzymes that enable the sperm to penetrate the egg's tough outer layer.
1. Egg
5. Fluid-filled cavity
6. Blastocyst
7. Lining of uterus
8. Cell cluster within the blastocyst's fluid-filled cavity forms the beginnings of the embryo.
9. The outer cells of the blastocyst anchor into the lining of the uterus.
10. Maternal blood vessels
If you ovulated and the egg met a sperm, amazing things will happen fast. It takes just three days from fertilization for a single egg to divide into a ball of 58 cells. By the end of the week, this ball, called the blastocyst, will have reached the uterus, where it will start to implant in the lining. It will be a couple of weeks before you know whether you've conceived, but special hormones kick in now to help maintain the pregnancy.
You are 2 Weeks and 2 Days Pregnant
What's happening insideHere is a diagram of a human egg cell 24 hours after fertilization. Around the egg is a thick layer (yellow) that has now become impenetrable. The circles inside, or pro-nuclei, contain genetic material from the mother and father before it has fused.read more
You are 2 Weeks and 3 Days Pregnant
What's happening insideWhen the two nuclei have pooled their genetic material to create a cell containing its full complement of 46 chromosomes-23 each from the mother and father-the cell can start dividing, shown here at the first division creating a two-celled body.read more
You are 2 Weeks and 4 Days Pregnant
What's happening insideThis is an embryo at the 16-cell stage, when it has changed from a zygote into a morula. It is in the process of dividing into a hollow ball of cells-the blastocyst-which will eventually implant in the lining of the uterus.read more
You are 2 Weeks and 5 Days Pregnant
What's happening insideThis is an embryo at the blastocyst stage, five days after fertilization. It is seen hatching from the shell that originally surrounded the unfertilized egg. At this stage, the blastocyst has moved into the uterus and is preparing to implant.read more
You are 2 Weeks and 6 Days Pregnant
What's happening insideThe blastocyst prepares to embed itself in the lining of the uterus-the endometrium. Once it is completely implanted-usually around seven days after fertilization-the pregnancy will become established.read more
You are 3 Weeks Exactly Pregnant
What's happening insideThe blastocyst is firmly embedded in the lining of the uterus. Once this has happened, the placenta (the temporary organ that supplies the growing embryo with oxygen and nutrients) will begin to develop.read more
