Pregnancy lasts about 40 weeks, counting from the first day of your last normal period. These weeks are grouped into three trimesters. See how your baby grows week by week. You can also register for our week-by-week newsletter and we’ll show you how your body is changing and your baby is developing.


  1. Early Fetal Development

    Fetal Development The development of a baby is a beautifully intricate process. From the moment the egg and sperm meet, your baby is growing. This early part of development lays the foundation for a healthy pregnancy and delivery. It is... more...
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  1. Fetal Development – How to Calculate
    Calculating the day your baby begins to develop and keeping track of...
    Posted on: 04/25/2019
  2. IVF Embryo Development Over 5 Days VIDEO
    The struggle to get pregnant is real. For many, infertility is a...
    Posted on: 05/25/2019
  3. Fetal Development: First Trimester
    The First Trimester of Pregnancy Week 1 & 2 - Gestational Age Your...
    Posted on: 05/01/2012
  4. Second Trimester: Fetal Development
    The second trimester is from week 13 through 28. For many women...
  5. First Fetal Movement: Quickening
    Some moms can feel their baby move as early as 13-16 weeks...
    Posted on: 04/25/2019
  6. The Maternal Ecosystem – Pre and Post-Birth
    Pregnancy is a natural function of a woman’s body, as is childbirth....
    Posted on: 05/10/2017
  7. Baby Development Month By Month Baby Development Month by Month A baby grows and develops an...
    Posted on: 11/16/2019
  8. Third Trimester of Pregnancy: Fetal Development
    The third trimester of pregnancy starts in week 28 of your pregnancy...
    Posted on: 05/01/2012
  9. Multiples Pregnancy: Twins, Triplets and More
    A multiples pregnancy means having twins, triplets or multiples. It's impossible to...
    Posted on: 04/25/2012
  10. How to Bond With Your Baby
    You’ve just endured seemingly endless hours of labor and pain that only...
    Posted on: 10/27/2019
  11. First Year Infant Development
    Perhaps your six month old has not rolled over yet, but the...
    Posted on: 04/25/2018
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