• zygote dividing in two
    Week 3 of Pregnancy
    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 creat...
  • embryo dividing into 16 cells
    Week 3 of Pregnancy
    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....
  • ovaries on day 2 of menstrual cycle
    Week 1 of Pregnancy
    Day 2 of your Menstrual Cycle
    What's happening insideYour eggs are already developing, as can be seen in this color-enhanced ovary. The small white structures are the immature follicles that contain the eggs at different stages of development. Once one of the follicles mature...
  • ovary at the end of fallopian tube ready to release egg
    Week 2 of Pregnancy
    Day 14 of your Menstrual Cycle
    What's happening insideThe ovary can be seen here at the end of the fallopian tube. At around this time of the menstrual cycle, a follicle at the surface of the ovary releases an egg, which is swept down the tube by clearly visible fingerlike pro...
  • human egg surrounded by sperm
    Week 3 of Pregnancy
    You are: 2 Weeks and 1 Day
    What's happening insideHere the egg is shown surrounded by sperm. Although only one sperm will fertilize the egg, several hundred are thought to be necessary to break down its defensive layers and enable fertilization to take place. ...
  • human egg with thick outer layer
    Week 3 of Pregnancy
    You are 2 Weeks and 2 Days Pregnant
    What's happening insideHere a human egg cell 24 hours after fertilization is artificially colored purple. Around the egg is a thick layer (yellow) that has now become impenetrable. The two red areas, or pro-nuclei, contain genetic material from t...
  • nuclei within cells
    Week 4 of Pregnancy
    You are 3 Weeks and 5 Days Pregnant
    Your baby todayThe first stage of placental development-your baby's life support system-is shown here. The image shows nuclei (blue) within a continuous network of cells that will become the placental villi. At first the tiny villi are solid; lat...
  • Baby Name Finder
    Baby Names
    Baby Name Finder
    Search names and meanings in our Baby Name center.
    familyeducation editors
  • sperm cell traveling along fallopian tube
    Week 2 of Pregnancy
    Day 13 of your Menstrual Cycle
    What's happening insideThe sperm cell can be seen here inside the fallopian tube. Since sperm can stay active and alive inside you for up to 72 hours, it's possible to get pregnant even if you don't ovulate for two to three days from now. ...
  • cervical mucus on day 10 of menstrual cycle
    Week 2 of Pregnancy
    Day 10 of your Menstrual Cycle
    What's happening insideAs ovulation approaches, more cervical mucus is produced. Here it has crystallized to form a "fern leaf" pattern. Around the time of ovulation the mucus becomes clear, slippery, and stretchy, which makes it easier for sperm...
  • ovarian follicles on day 8 of menstrual cycle
    Week 2 of Pregnancy
    Day 8 of Your Menstrual Cycle
    What's happening insideHere, three developing ovarian follicles can be seen in white. The inner circle of each is the egg. Of the follicles shown, it is likely that only one will fully mature at ovulation and release an egg. ...
  • cervical mucus on day 10 of menstrual cycle
    Week 2 of Pregnancy
    Day 10 of your Menstrual Cycle
    What's happening insideAs ovulation approaches, more cervical mucus is produced. Here it has crystallized to form a "fern leaf" pattern. Around the time of ovulation the mucus becomes clear, slippery, and stretchy, which makes it easier for sperm...
  • the brain releasing hormones on day 4 of menstrual cycle
    Week 1 of Pregnancy
    Day 4 of your Menstrual Cycle
    What's happening insideIn this color 3-D scan of the human brain, the green central structure is the hypothalamus. This controls emotions and body temperature, and releases chemicals that regulate the release of hormones from the pituitary gland ...
  • ovaries on day 2 of menstrual cycle
    Week 1 of Pregnancy
    Day 2 of your Menstrual Cycle
    What's happening insideYour eggs are already developing, as can be seen in this color-enhanced ovary. The small white structures are the immature follicles that contain the eggs at different stages of development. Once one of the follicles mature...
  • Pregnancy
    Week 1 of Pregnancy
    Day 3 of your Menstrual Cycle
    When you're trying to get pregnant, it helps to be aware of lifestyle and medical factors that can affect your menstrual cycle. ...
  • ultrasound of human fetus 37 weeks and 5 days
    Week 38 of Pregnancy
    You are 37 Weeks and 5 Days Pregnant
    Your baby todayThe size of your uterus may have reduced slightly as your baby's head becomes more deeply engaged within your pelvis, allowing her body to move down. This can take some of the pressure away from your ribs, which is a welcome relief...
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    Activities and Crafts
    Activity Center
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    familyeducation editors
  • IntimateCouple,SmilingCouple
    Ovulation and Conception
    Top 10 Tips to Boost Your Chances of Getting Pregnant
    So you've decided to have a baby. Congratulations! Now comes the hard work of actively trying to conceive. Although there is no "magic" pill to get pregnant, some simple methods have been shown to increase your odds. Whether they are scientifical...
    Lindsay Hutton