Pregnancy: May 2009 Babies Community
About This Community:

This patient support community is for discussions relating to pregnancy, childbirth and maternity for babies due or born in May 09.

Font Size:

Pregnancy Week by Week: Week 4...

Left Arrow  Pregnancy Week 3 - Small  Pregnancy Week 4  Pregnancy Week 5 - Small  Right Arrow

Week 4



Breaking the ovulation cycle!


Pregnancy MomWhat Is Happening To Your Body


At week 4 of your pregnancy, implantation is still taking place. You will begin to produce higher levels of the hormones estrogen and progesterone, which will cause many of the changes in your body throughout the rest of the pregnancy.


At about 6 to 12 days after fertilization, your HCG levels will be high enough to be detected in a home pregnancy test. If the test is positive, schedule an appointment with your health care provider to confirm the results. You may also experience the typical signs of pregnancy, including fatigue, frequent urination, breast pain and morning sickness.


Pregnancy BabyWhat Is Happening To Your Baby

The cells in the embedded blastocyst begin to differentiate, or specialize, into distinct layers which later undergo further differentiation. One such layer undergoes a process known as gastrulation in which it further differentiates into three layers that will form the baby’s organs and tissues (the ectoderm, endoderm, and mesoderm). At this point, your baby is roughly the size of a poppy seed.


In the late stages of week 4 or early stages of week 5, tiny arms and legs, called buds, begin to develop, although they are not yet visible.


Small Left Arrow What Is Happening This Week? Small Right Arrow

Weight Tracker
Weight Tracker
Start Tracking Now
Start Date
Jul 27, 2009
by darrensv1
Last Revision
Nov 13, 2009
by Med Help